Since the reform and opening up, especially since the 18th National Congress of the Communist Party of China, with the sustained and stable economic development, China’s industrial chain supply chain has made great progress, its core competitiveness has been continuously enhanced, and its independent and controllable ability has been further enhanced. China’s position in the global industrial chain supply chain continues to climb, which provides strong support for accelerating the construction of a modern economic system and promoting high-quality development.

At the same time, however, the unbalanced development of China’s industrial chain supply chain is more prominent, and different industries have obvious differences in development speed, development stage and modernization level. In particular, the world has entered a new period of turbulence and change, the game between big countries has intensified, the suppression and containment from outside may escalate at any time, the risk of "chain sticking" and "chain breaking" has increased, and the trend of "decoupling" is looming, which brings great challenges to the reliability and security of China’s industrial chain supply chain. Therefore, we must adhere to the bottom line thinking, plan ahead, speed up the short board, strong and weak items, focus on improving the resilience and safety level of the industrial chain supply chain, and firmly grasp the development initiative in our own hands.

First, accelerate the realization of high-level scientific and technological self-reliance. Based on independent innovation, we should make good use of the remarkable institutional advantages of "a national chess game" to concentrate on doing great things, give play to the basic and strategic supporting role of education, science and technology and talents, take the national strategic demand as the guide, gather strength to carry out original and leading scientific and technological research, speed up the breakthrough and self-control of key core technologies, reduce the dependence on foreign technologies, break the situation that key core technologies are subject to people as soon as possible, and make the supply chain of industrial chain "complement, extend, consolidate and strengthen"

The second is to strengthen the construction of the industrial chain supply chain ecosystem. It is necessary to give play to the leading role of scientific and technological innovation, solve a number of "stuck-neck" problems as soon as possible, open up blocking points and solve difficulties, especially to fill in outstanding shortcomings such as basic software, core hardware and basic raw materials, accelerate the improvement of the modernization level of industrial chain supply chain, and realize independent control of industrial chain supply chain; Consolidate and enhance the international leading position of traditional advantageous industries, build a coordinated industrial chain supply chain system with high, medium and low end, and enhance the toughness of industrial chain supply chain; Actively promote the international cooperation of industrial chain supply chain, establish an industrial chain supply chain ecosystem with China’s industrial chain supply chain as the core and radiate many aspects, and continuously enhance the international influence of China’s industrial chain supply chain.

The third is to continuously stimulate the vitality of market players. To improve the resilience and safety level of the industrial chain supply chain, the market subject is the core. Promote a better combination of effective market and promising government, create a market-oriented, rule-based and international first-class business environment, boost the development confidence of market participants, enhance their expectations, give full play to the engine function and radiation-driven role of leading enterprises, promote the mutual support and coordinated development of industrial chain and supply chain, create a number of "specialized and innovative" enterprises, breed more new industries, new models and new formats, form more new growth poles and points, and create new advantages of industrial chain and supply chain.

(national academy of economic strategy researcher Zhang Deyong)

(Central Radio and Television General Station CCTV Network)

　　According to the website of China Banking and Insurance Regulatory Commission, China Banking and Insurance Regulatory Commission continues to promote the opening of banking and insurance industry to the outside world, optimize the business environment for foreign investors in the financial sector, enrich market supply, enhance market vitality, enhance competitiveness and promote the healthy development of China’s financial industry. Recently, seven new policies and measures for opening to the outside world have been studied and released.

　　I. Encourage overseas financial institutions to participate in the establishment and investment of financial subsidiaries of commercial banks.

　　The Measures for the Administration of Financial Subsidiaries of Commercial Banks clearly stipulates that financial subsidiaries of banks can be wholly-owned by commercial banks, or jointly funded with domestic and foreign financial institutions and domestic non-financial enterprises. Introducing foreign financial institutions with expertise and international influence in wealth management and investing in bank wealth management subsidiaries is conducive to introducing advanced and mature investment concepts, business strategies, incentive mechanisms and compliance risk control systems in the international asset management industry, further enriching the supply of financial products, stimulating the vitality of market competition and promoting the healthy and orderly development of China’s bank wealth management business. China Banking and Insurance Regulatory Commission will guide qualified and willing banks to strengthen active contact with relevant foreign-funded financial institutions, and continue to encourage and guide bank wealth management subsidiaries to do a good job in introducing foreign capital.

　　Two, allow overseas asset management institutions and subsidiaries of Chinese banks or insurance companies to set up a foreign-controlled wealth management company.

　　China’s asset management market has a huge scale and development potential, and it is difficult for existing asset management institutions to fully meet the rapidly growing diversified market demand. Compared with international advanced asset management institutions, most of the asset management institutions of Chinese banks and insurance companies, including wealth management subsidiaries, have been established for a short time and have less experience. At present, Chinese banks, insurance companies and foreign advanced asset management institutions are mainly engaged in business cooperation, allowing joint ventures to set up foreign-controlled wealth management companies, which is conducive to introducing international advanced asset management practices and professional experience, promoting the steady development of asset management industry and capital market, giving play to the respective advantages of Chinese and foreign asset management institutions, further enriching market players and business products, and meeting the diversified service needs of investors. At the same time, the existing asset management subsidiaries of Chinese banks and insurance companies can complement each other with their foreign wealth management companies, and develop at a moderate dislocation.

　　Overseas asset management institutions and subsidiaries of Chinese banks or insurance companies are allowed to jointly set up foreign-controlled wealth management companies. In the early stage, pilot methods can be adopted to give priority to supporting the entry of mature and stable wealth management institutions recognized in foreign markets. Both RMB funds can be raised and some foreign currency long-term funds can be raised. In the pilot process, China Banking and Insurance Regulatory Commission will pay more attention to the professionalism, prudence and stability of supervision, pay more attention to the supervision after the event, guide the steady development of institutional compliance through on-site inspection and off-site supervision, sum up the pilot experience in a timely manner, and study and expand the pilot scope in a timely manner.

　　Three, allow overseas financial institutions to invest in the establishment and shareholding of pension management companies.

　　At present, China’s pension management market is dominated by the second pillar enterprise annuity fund management, with limited scale and growth. However, the domestic pension management company is still in the pilot stage, and the pilot adopts the method of one mature company and one approved company. There is only one Jianxin pension management company established by CCB. Allowing foreign investors to set up pension management companies is conducive to increasing the types of subjects, enhancing market vitality, introducing mature pension management experience and improving the level of pension investment management. In the next step, China Banking and Insurance Regulatory Commission will promote the improvement of relevant laws and regulations, and continue to adopt the method of "one mature company, one approved company", and work with relevant ministries and commissions to do a good job in the licensing of pension management companies.

　　Four, support the establishment of wholly foreign-owned or equity money brokerage companies.

　　In 2005, the State Council approved the pilot of money brokerage companies. Since the pilot, five money brokerage companies have been established to actively carry out transactions in foreign exchange market, money market, bond market and derivative products market at home and abroad, which has played a positive role in activating China’s financial market, improving transaction efficiency and reducing transaction costs. At present, the top five money brokerage companies in the world have all participated in the establishment of five money brokerage companies in China through joint ventures.

　　Further increasing the proportion of foreign shares in money brokerage companies is conducive to giving full play to the management advantages of foreign shareholders, improving the operating efficiency of money brokerage companies, promoting orderly competition in the industry, and improving the transparency and transaction efficiency of financial markets. China Banking and Insurance Regulatory Commission actively supports Chinese and foreign shareholders of existing currency brokerage companies to determine their own foreign share ratios on the basis of equal consultation. At the same time, on the basis of comprehensive evaluation of the impact of newly established currency brokerage companies on the existing market competition pattern, we will steadily promote the establishment of new foreign currency brokerage companies.

　　5. Shorten the transition period from 51% to 100% for foreign-funded life insurance companies to 2020.　

　　On July 2, 2019, Premier Li Keqiang delivered a special speech at the opening ceremony of the 2019 Davos Forum, saying that the original stipulation of canceling the foreign life insurance share ratio limit in 2021 would be advanced to 2020. Abolishing the share ratio restriction of foreign-funded life insurance companies will help attract more high-quality foreign-funded insurance institutions to enter the China market, introduce more advanced business concepts and more diversified life insurance products, enhance the vitality of the life insurance market and provide better services for the real economy. In the next step, China Banking and Insurance Regulatory Commission will promote the promulgation of "Regulations on the Administration of Foreign-funded Insurance Companies in People’s Republic of China (PRC)" and other relevant laws and regulations, and timely implement the regulations in relevant administrative licensing work. At the same time, strengthen post-event supervision and maintain market order.

　　Six, cancel the provisions of domestic insurance companies holding the shares of insurance asset management companies shall not be less than 75%, allowing foreign investors to hold more than 25% of the shares.　

　　Loosening the restrictions on the foreign shareholding ratio of insurance asset management companies is conducive to absorbing the experience and practices of excellent overseas insurance institutions, stimulating the vitality of the domestic insurance asset management market, promoting the improvement of the asset management capabilities of insurance asset management companies, and better serving the preservation and appreciation of insurance assets.　

　　In the next step, China Banking and Insurance Regulatory Commission will promptly revise the Interim Provisions on the Administration of Insurance Asset Management Companies and implement the opening-up measures. While opening wider to the outside world, China Banking and Insurance Regulatory Commission will continue to improve the regulatory requirements of insurance asset management companies, strengthen the management of shareholders’ qualifications, further strengthen the continuous compliance requirements of insurance asset management companies, and effectively guard against various risks.　

　　Seven, relax the access conditions of foreign-funded insurance companies, cancel the 30-year operating life requirement.

　　At present, foreign insurance companies to set up foreign-funded insurance companies in China need to meet the requirements of operating insurance business for more than 30 years. In recent years, with the deepening of opening to the outside world, most foreign insurance companies in Fortune Global 500 have entered China and played an active role in the insurance market in China. The cancellation of the 30-year operating life requirement has created conditions for foreign insurance companies with operating characteristics and expertise but insufficient operating life to come to China, which is conducive to further enriching insurance market players and insurance professional services and promoting the high-quality development of the insurance industry.

　　Welcome more qualified foreign insurance companies to set up business offices in China, combine their advanced experience with the reality of China, and promote each other with Chinese companies in the competition to jointly serve the real economy and the increasingly diversified financial service needs of consumers. China Banking and Insurance Regulatory Commission will immediately start the revision of relevant laws and regulations, and put them into practice upon completion.

Wen | Different View Finance

In the field of long video, three video platforms, iQiyi, Youku and Tencent Video, have formed a "three-legged" trend. Three platform opportunities can lead the development direction of the long video industry.

On February 28th, Beijing time, iQiyi (NASDAQ: IQ) announced the unaudited financial report for the fourth quarter and the whole year as of December 31st, 2019. The financial report shows that in the fourth quarter of 2019, iQiyi’s revenue was 7.5 billion yuan and its net loss was 2.5 billion yuan. Both revenue and net loss were better than expected.

Although iQiyi, Youku and Tencent Video are backed by BAT, they still lose money and continue to burn money. The profit seems to be in the foreseeable future. Judging from the latest financial report released by iQiyi, the loss is narrowing. Is this a positive signal?

Why is the long video platform difficult to make a profit from the iQiyi financial report?

According to the financial report, Iqiyi’s Q4 revenue in 2019 was 7.497 billion yuan, up 6.7% from 7.027 billion yuan in the same period of last year, up only 1.4% from 7.397 billion yuan in the previous quarter.

(Source: Financial Report)

As can be seen from the above figure, although iQiyi’s revenue maintained growth, the year-on-year growth rate continued to decline. Iqiyi’s income mainly consists of membership services, online advertising services, content distribution and other income.

In the fourth quarter, Iqiyi’s membership income was 3.861 billion yuan, up 20.6% from 3.201 billion yuan in the same period of last year, up 3.9% from 3.717 billion yuan in the third quarter. In the fourth quarter, membership service revenue accounted for 51.5%, making it the largest source of income for iQiyi. Iqiyi said that the revenue growth was mainly due to the high-quality content and diversified operations, which promoted the growth of the number of subscribers.

Gong Yu, founder, director and CEO of Aiqiyi, said that the revenue of Aiqiyi’s membership business increased by 36% in 2019, and the number of subscribed members reached 107 million. Looking forward to the next decade, the upcoming continuous innovation of 5G commercial and artificial intelligence technologies will bring great opportunities to Aiqiyi. As users in China are more and more willing to pay for high-quality content and use convenient payment methods, they will jointly bring great growth potential to the iQiyi business.

According to the financial report, as of the end of the fourth quarter, the number of subscribed members of iQiyi reached 107 million, and the number of subscribed members increased by 22% year-on-year. On the whole, the growth of subscription members is also slowing down, and with the decline of demographic dividend, membership growth seems to have peaked.

(Source: Financial Report)

Online advertising revenue was 1.883 billion yuan, down 14.6% from 2.204 billion yuan in the same period of last year and down 8.9% from 2.067 billion yuan in the third quarter. In the fourth quarter, online advertising revenue accounted for 25.1%, and the contribution of online advertising revenue continued to decline. Iqiyi said that macroeconomic challenges have led to a decline in online advertising revenue. Yiguan Finance believes that the decline in online advertising revenue is also related to the rapid development of short video platforms. With the rise and rapid development of short video platforms such as Aauto Quicker, Tik Tok and bilibili, users’ attention and advertisers’ budget have shifted, and the advertising business of long video network has been robbed of "share".

Content distribution revenue was 878 million yuan, a year-on-year increase of 68%. Content distribution income mainly comes from broadcasting authorized content. In 2019, hit dramas, such as Little Joy, Dear, Love, and Joy of Life, were distributed by iQiyi. From the perspective of revenue growth, the distribution of these hit dramas has achieved good results.

In the fourth quarter, the income from other businesses of iQiyi was 874 million yuan, down 21% year-on-year. In 2019, the annual revenue was 3.7 billion yuan, a year-on-year increase of 30%. This is mainly due to the growth of many vertical businesses, especially the strong growth of game business after the acquisition of Tianxiang Mutual Entertainment.

Thanks to the reduction of content cost, iQiyi’s Q4 net loss in 2019 was 2.49 billion yuan, narrowing by 28% year-on-year and 32.6% quarter-on-quarter. However, in 2019, iQiyi lost 10.3 billion yuan for the whole year, still showing an expanding trend year-on-year.

According to the financial report, in Q4 of 2019, the operating cost of iQiyi was 7.914 billion yuan, and the content cost was 5.7 billion yuan, accounting for 72% of the operating cost. Content cost includes copyright purchase cost and content production cost.

Gong Yu, founder, director and CEO of iQiyi, mentioned in the earnings conference call that the content cost in 2019 only increased by 6% because of the continuous optimization of the content structure. The financial report shows that in 2019, the content cost of iQiyi was 22.2 billion yuan.

As can be seen from the balance sheet of iQiyi, the content assets of iQiyi include current assets-net value of copyright content, non-current assets-net value of copyright content, and non-current assets-net value of self-made content.

The financial report shows that as of December 31, 2019, iQiyi’s self-made content assets were 4.355 billion yuan, an increase of 16.6% compared with 3.736 billion yuan in the same period of last year; At the end of the period, the authorized content assets totaled 7.51 billion yuan, down 3.7% year-on-year.

From the changes of self-made content assets and authorized content assets, iQiyi achieves structural optimization by increasing the proportion of self-made content and decreasing the proportion of authorized content.

Gong Yu said at the conference call that film and television plays are still the main driving force for members to add value. At present, the hit dramas on the platform of iQiyi, such as Joy of Life and Dear, Love, all belong to copyrighted works.

Self-made video content, which will involve IP copyright purchase of film and television dramas, actor pay, shooting and other production costs, which are all important items of cost expenditure. The self-made variety "Qi Pa Shuo" has continued for six levels, and the topic heat has remained unchanged. "Sword Dynasty", starring Li Xian, a streaming star, is popular in Iqiyi. Although the limitation of star pay and the rising trend of drama prices slow down, the cost of purchasing copyright and the cost of self-made drama and variety shows decrease, it still cannot reverse the loss of video platforms.

In the case of membership growth meeting the ceiling, video websites began to change their thinking and tap the value of membership. If video websites want to turn losses, they need to constantly try new business models.

In terms of member value-added services, the charging mode of "member-on-demand in advance" launched by the video platform was criticized by the whole network and was questioned as "ugly", but it did not stop the determination of video websites to implement the charging mode of "member-on-demand in advance", which will become a normal broadcasting mode in the future.

Gong Yu thinks that although there are relatively few dramas adopting this mode at present, it accounts for a small proportion of the total revenue, but this mode is successful. "In the future, we will take this mode as a normal way of broadcasting. At present, the impact of advanced on-demand on the average revenue per user (ARPU) in the fourth quarter of 2019 and the first quarter of 2020 is not great, but it will be an important way to improve ARPU in the future. "

Iqiyi is constantly changing in the form of advertisements, such as patch advertisements and original small theater advertisements for online dramas. Iqiyi is also constantly trying to make use of advertising resources. Although Iqiyi members have purchased VIP members, they still have to watch advertisements. For example, in a 45-minute episode, all kinds of advertisements are inserted in the title, preview, film and ending, and even members are not spared. Some members can close it manually, while others can’t close it by force.

Iqiyi also said that the membership fee has increased. With the development of video websites for many years, people in China have a certain understanding of the paid membership model, but the acceptance of the paid membership model in China is not so high. In the long-term competition, video websites attract paying members through promotion, although it can boost revenue growth, but it is difficult to achieve profitability. Under the situation of tripartite confrontation, if only one party announces the price increase, it is likely to cause the loss of users.

Video websites are still content-oriented. Yiguan Finance has conducted a small-scale survey. Most paid members of video websites said that a video website member can almost meet their own needs for watching movies/dramas. Which platform can meet your own viewing needs, you will choose which platform, and you will not love a certain platform alone. There are also some users who have registered a number of platform members, but they will not buy annual members, but will only choose monthly membership when chasing a favorite film and television drama.

From this point of view, the loyalty of video platform users remains to be assessed. Whether the video website has enough rich content such as TV dramas and variety shows is the key to retain users. After all, users pay for high-quality content, and the continuous output of high-quality content is the key to the continuous growth and retention of paying users on the platform.

In addition, some insiders told Yiguan Finance that there is another factor in the loss of video websites, that is, the pressure on servers and bandwidth. The video platform should ensure that hundreds of thousands or even millions of people can watch online at the same time, and sometimes upload data traffic such as barrage. These fixed expenses are not small.

With the sudden outbreak of the COVID-19 epidemic, everyone was forced to stay at home and play drama. As a result, when I wanted to meet you was updated on February 26th, iQiyi collapsed, and "iQiyi collapsed" was returned to Weibo for hot search. From the technical principle, there are two reasons for the server crash, one is that the server content is tight, and the other is that the service design is flawed. It seems that Ali, JD.COM and others built their own cloud computing data centers for a reason.

In the layout, short videos, long videos and short videos erode each other and fight hand in hand?

Typical Internet users will allocate their online entertainment time to many different fields, including video (Youaiteng’s three long video websites; Tik Tok, Aauto Quicker and other short video sites) game videos (Tiger Tooth, bilibili, Betta Fish, etc.) and news push platforms. With the disappearance of traffic bonus, the peak of membership and the continuous loss, iQiyi needs new stories to enhance its commercial imagination. With the rapid rise of short videos, Iqiyi is constantly trying to seek new breakthroughs.

In fact, iQiyi has launched a variety of short video products, such as gingerbread, whale eating, natto, Jinshi and many videos. Although it failed to attract enough attention, it never gave up. Currently in the "Small Video" entrance of the top column of iQiyi app.

According to Tech Planet, iQiyi recently launched a short video featuring short videos of young trends. Iqiyi launched the "Shake Short Video" this time, on the one hand, it is an expansion and attempt of its own short video classification, on the other hand, it is to seize the popularity of 5G, constantly innovate, accelerate trial and error, and strive to create an explosive short video APP.

For the layout competition in the field of short video, at the conference call of Iqiyi’s 2019 Q4 and annual financial report, Gong Yu, the founder and CEO of Iqiyi, announced that he planned to launch a YouTube mode App called "On Time", and said that Ge Hong, who had rich technical and management experience in companies such as Facebook and Airbnb, would fully lead the business. This seems to show the determination of short videos in the layout of iQiyi.

It is reported that there will be two main categories of "on-demand" video content. The first category is PUGC content, which is mainly uploaded by MCN, individuals and professional organizations. In addition, the long video content of iQiyi will also be played on-demand, thus forming a strategic synergy of "long video+short video".

The content production methods of short videos are mainly PGC (professional production content) and UGC (user-produced content), which are mainly realized by advertising. The long video is either self-made or needs to buy copyright, and the realization methods are mainly user payment and advertising.

In the field of short and medium videos, iQiyi will face the competition from headline department, bilibili and Tik Tok.

Headline has a huge user base and a high daily activity rate, which lays the foundation for the commercial realization of long video. Headlines rely on its good recommendation algorithm to analyze and summarize users’ video preferences and playing habits through big data, and apply them to headline-made videos. They can even customize headline users’ exclusive homemade dramas and homemade variety shows according to the results of big data analysis and user preferences.

Compared with short video platforms, the advantages of long video platforms such as Youaiteng come from the copyright and IP resources of a large number of content creators. Youaiteng takes the lead in the segmentation field in the short video industry through its own areas of expertise. Strict supervision has, to some extent, "forced" the short video head platform to enhance the awareness of copyright, continuously expand the content map, and cultivate and expand the long video user base.

With the sudden outbreak of the COVID-19 epidemic, all the films for the Spring Festival in 2020 were withdrawn. On January 24th, Lost in Russia, directed by Xú Zhēng, announced that he would cooperate with ByteDance’s platform, and the "Headline System" short video platform (Tik Tok/Watermelon/Volcano) was broadcasted independently for free, which aroused the attention and heated discussion in the industry. Many people think that this is not only a symbol of headlines entering the long video and film industry.

With the expansion of users, long and short video platforms have already eroded each other. Short video platforms pay more and more attention to original content, and the competition for original content between long and short video platforms will become more and more fierce.

　　Today viewpoint

　　In the autumn of 2017, the cigar-shaped Oumuamua broke into the solar system and became the first interstellar visitor discovered and confirmed by scientists, which caused a lot of noise and turmoil in the scientific community. Although it is still unknown whether it is an asteroid, a comet or an alien spacecraft, American scientists have recently said that "flying immortals from outer space" like Omo Mo may not be special, and the elements of life on earth may originate from other star systems, which arrived on Earth by hitchhiking with interstellar visitors like Omo Mo Mo.

　　But at present, these are only assumptions. We need to "catch" more celestial bodies similar to Omo Mo for in-depth research with the help of large telescopes in the future to get the final answer.

　　"Omo Mo" is not special

　　The researchers said that "Omo Mo" is the first confirmed interstellar object we have observed in the solar system, but this does not mean that it is the first interstellar object to reach the solar system in history.

　　"We think, like ‘ Omo Mo ’ Such an object … … At any time, there will be one at a distance of one astronomical unit from the sun (the average distance between the earth and the sun is about 150 million kilometers). " At the "Breakthrough Discuss" conference held at the University of California, Berkeley last month, Bill Porter, head of the Department of Space Studies at the Southwest Research Institute in Colorado, said, "This actually has a very meaningful impact, similar to ‘ Omo Mo ’ Objects may bring life from one celestial body to another. "

　　This idea is called "panspermia)— — The theory put forward by scientists in the 1970s that life on earth came from space. At that time, the British physicist Lord kelvin believed that alien bacteria could reach the earth by comet or meteor and thrive on the earth; Other scientists believe that microorganisms can be embedded in dust particles and pass through galaxies, and they run from one planetary system to another through slight stellar radiation pressure.

　　Can provide heat insulation and radiation protection for microorganisms.

　　At present, the exact size of Omo Momo is still unknown, but researchers believe that its longest size is no more than 800 meters. The object will show "non-gravitational acceleration" when it is far away from the sun, which makes people speculate that "Omo Mo" may be some kind of alien spacecraft.

　　But the more common view is that the "intruder" of this solar system is very cold, and its strange movement is caused by the exhaust gas similar to a comet. When the comet approaches the sun, the ice on it will sublimate directly from solid to gas, forming a huge comet head and a long comet tail. When these gases are released, astronomers can use telescopes to study and determine their composition.

　　Karen Mitch, an astrobiologist at the Institute of Astronomy, University of Hawaii, said: "This tells us that ice can be preserved after such a long journey." Previous studies on comets and other small celestial bodies in our solar system show that objects like Omo have good heat insulation and radiation protection functions, which is good news for any microorganism that may "hitchhike". "Living organic matter can be found in ‘ Omo Mo ’ The interior is well protected. "

　　Astronomers have not found the star system that gave birth to Omo, so we don’t know how long ago Omo was ejected into the dark and cold interstellar dust. But Mickey said that it may have traveled through interstellar space for 10 million years or more.

　　Looking for the next interstellar object to study.

　　Of course, it is still unclear whether any hypothetical creature on Omo will survive the collision with the earth. Mickey said that this icy object hit us at a speed of 215,000 km/h relative to our planet. "This is a very high impact speed."

　　In this regard, Stern Sigurdsson, a professor in the Department of Astronomy and Astrophysics at Pennsylvania State University, said in another speech at the "Breakthrough Discussion" conference that "Omo Mo" and its "passengers" may be quite soft, so after hitting the earth, they may land relatively gently and disperse when they break into our atmosphere.

　　Sigurdsson said that the previous work of Ivey Laueber, director of the astronomy department of Harvard University, and others, as well as his own calculations show that in the nearly 4.6 billion years of history of our planet, about 100 celestial bodies like Omo have hit the earth. "So, we don’t know whether there is a biota inside one of these celestial bodies."

　　Laueber added that we don’t know where Omo is now. "Therefore, it is more meaningful to find the next interstellar object." The powerful large-scale weather measuring telescope (SST) is scheduled to take off from Chile next year and begin to observe the sky. When it runs "full of blood", it may find an interstellar object every month for our study.

　　In addition, scientists suggest that it is also possible that life reached the earth only a short distance long ago. Earthlike planets in our solar system exchange rocks quite regularly, as evidenced by the increasing number of Martian meteorites on earth. In fact, some researchers believe that life on earth may have started on the red planet, and a Martian stone reached the earth in a strong impact.

　　Of course, all this is just a hypothesis, and more scientific evidence is needed to reveal one of the ultimate puzzles of mankind — — Where we come from.

　　(Science and Technology Daily, Beijing, May 8 th)

Special feature of 1905 film network The 2024 Spring Festival movie, which set a total box office record, has come to an end, but films such as the Spring Festival movie still perform steadily in the movie market. Solid quality and good reputation have made the four films show a gratifying long tail effect at the box office, among which "Article 20" came from behind and has led the single-day box office list and the movie attendance list for ten consecutive days as of the evening of the 28th.

Spring is getting warmer, and March is coming, and the movie market activated by the Spring Festival file will also usher in a new lineup. Nearly 30 films "get together" are scheduled for March, with diverse types and stars. More than 20 domestic films continue to flourish, including those that have been shown in the near future, and those that have been well received during the Spring Festival. When they are not shown, they have triggered a very hot new film, which will also welcome the inspection of the audience.

Competing with them on the same stage, there are also many imported foreign films that sell well. At the beginning of the month, it was re-released and (the first film) was warmed up, and the week of big IP blessing was new, and there were countless overseas awards and "the first real-life film of mankind" shocked. Who will win the first prize in the "Spring Mountain" in March?

March screen multi-line outing

The new domestic film shakes the sun brilliantly.

Action suspense, youthful love, absurd comedy, dramatic life … … Diversified theme content and different types of characteristics are the outstanding features of the new films made in China in March.

As a guest film channel "Today’s Film Review", film critic and producer Fujii Shu described these new films as "rich, diverse, light and agile". Taking the Spring Festival outing route as a metaphor, she divided the "movie-watching route" in March into four parts — — You Lost by Me and Viva La Vida form a romantic leisure line, Brilliant She and Chasing the Moon form a warm parent-child line, while Zhou Chu eliminates three evils, plays and kills and opens up a hard-core adventure line, waiting for a bosom friend on a small hiking line.

Hot Movie Promotion (in chronological order)

Eliminating three evils in Zhou Chu

Director and screenwriter:

Starring:,,,,

Release date: March 1.

Synopsis: Chen Guilin (Ehan Juan), a wanted criminal, is dying, only to find that he is only ranked third on the wanted list. He is determined to find out the whereabouts of the first two wanted criminals and get rid of them one by one … …

Aspect: The film ingeniously uses the allusions of "Eliminating Three Harms at Zhouchu" in The Book of Jin and Shi Shuo Xin Yu, and discusses the reaction of "greed and ignorance" from the absurd perspective of self-rescue, which can not only provide a sense of genre film, but also have a strong social warning significance. With the early screening, its Douban film score rose to 8.4 points, and the action scenes and cult plots in the film won online praise. Ehan Juan’s appearance and performance were rated as "handsome to a new height" when he performed the drama of "Return of the Prodigal Son".

Play killing

Director and screenwriter:

Starring:,,,,, Niu Xinxin, Feng Xinyao

Release date: March 2

Synopsis: A generation of famous actresses who fell in love with the country were killed by dark guns! On the first seven nights, private detectives (Jia Bing) are flying all over the sky and many suspects are hijacked in a theater. Known as "crazy", the mysterious flower face band surrounded them, forcing Inspector Man to find out the real murderer within four hours … …

Aspect: Whether the story of "script killing" can reach the previous height remains to be tested by the audience. The comic meaning introduced by comedians such as Jia Bing may bring different miraculous effects to this genre.

A stranger’s knife

Director:

Screenwriter: Tommy

Starring:,, Xia Meng,, Liu Hua

Release date: March 2

Synopsis: There was chaos in the world, and the King of Qi usurped power, secretly killing the heir of the Prince. Tian Anye (Max Zhang), a charcoal seller, was inadvertently involved in this game. In a life-and-death struggle, the secret of Tian Anye and the truth of the martyrdom of the people in Liangcheng in those days were also revealed … …

Aspect: As a rare martial arts action movie in the cinema, an unremarkable movie promoted in advance may bring surprises. The audience who are familiar with Max Zhang’s modern action drama will also enjoy a different kung fu feast in this costume movie.

You lost by me

Director:

Screenwriter:

Starring:,,,

Release date: March 8

Synopsis: The boy Bai Xiaoyu (JC-T) and the girl Wang Jinjin (Zhang Jingyi) meet for the first time in the college entrance examination, and Bai Xiaoyu loses Wang Jinjin for the first time in the vast sea of people. Four years later, they met again unexpectedly and fell in love. In 2018, after knowing each other for eight years and loving each other for five years, they stood in front of the marriage and hesitated, but they fell in love but could not escape the heavy fetters of reality. Will Bai Xiaoyu lose Wang Jinjin again?

Aspect: The film is adapted from the popular novel Wang Jinjin, which I lost twice, and was personally adapted by the original author Zheng Zhi. After 15 years, JC-T returned to the screen. What kind of spark will he have with Zhang Jingyi, the spokesman of youth pain, as the leading actor in the film for the first time?

Chasing the moon

Director and screenwriter:

Starring:

Release date: March 8

Synopsis: Teacher Qi (Caifei He), a famous Shaoxing opera actress, became famous all over the country with a movie Chasing the Moon when she was young. After many years of success, she suddenly returned home and wanted to reunite with her family. The abandoned eldest son, Qiu Sheng (Yuan Wenkang), and the youngest son, Xia Sheng, are hard to get close to her, and an unexpected event gradually reveals the secret truth of the past … …

Aspect: Caifei He won the Best Actress Award in the 36th Chinese Film Golden Rooster Award, and her heartfelt acceptance speech was quickly "out of the circle", which triggered a phenomenal discussion on the whole network. In addition to Caifei He’s award-winning performance of "Don’t be crazy, don’t survive", the film text comes from the novel Past, which won the eighth Lu Xun Literature Award. The combination of strong literariness and Yue Opera, a traditional Chinese opera form, is also expected.

Brilliant her

Director:

Screenwriter: Zhang Li

Starring:,,,

Release date: March 15th.

Synopsis: The kind and tolerant grandmother (played by Kara Wai) meets her granddaughter (played by Liu Haocun) who was accidentally lost 12 years ago. The grandparents and grandchildren are estranged and close to each other, and their secrets are gradually revealed … …

Aspect: Kara Wai and Liu Haocun are partners for the first time, and the performance presented in the preview is full of emotions and moving. In addition, the film also focuses on social hot topics such as campus bullying, and how to observe it in depth is worth looking forward to.

Viva La Vida.

Director:

Screenwriters: Han Yan, Wang Xiaoai and Yang Fuzhi

Starring:,,,, Liu Dan,

Release date: March 30th.

Synopsis: "Mindless" Lu Tu (Peng Yuchang) meets "Unhappy" Ling Min (Li Gengxi), two seriously ill young people with different personalities. Because of the agreement of "relay for life", they mistakenly embarked on a healing journey full of love and strength.

Aspect: The film is the final chapter of the trilogy of life directed by Han Yan. Despite withdrawing from this year’s Spring Festival due to "wrong schedule selection" and other reasons, the film still gained a high reputation during the screening period, and the performances starring two young people were widely praised.

Galaxy writer

Director:,

Screenwriter: Ice Shan, Li Kuo,

Starring:,,, Li Wenru

Release date: March 30th.

Synopsis: Zhang Yiyi (Song Muzi) and Sun Tan (He Wenjun), two small screenwriters with dreams, wrote the original screenplay "Seven Seconds Man" that they thought could go down in history. With the help of a group of friends, they searched for employers and producers, tried to put the film on the big screen, and started a journey of "finding dreams" that was ironic.

Aspect: At the 17th FIRST Youth Film Exhibition, the film won two awards, which were praised by many people in the industry and recommended by "tap water". The film, praised as "The Screenwriter’s Picture Book of Survival" and "The Enlightenment of Contemporary Migrant Workers’ Survival", may gain more bosom friends among young literary fans.

Big IP, see you next week

The foreign film market is full of flowers.

The upsurge of Chinese films brought by the Spring Festival stalls has injected vitality into the film market in 2024. As spring approaches, more overseas imported films join the film market.

According to Jin Yuxuan, a teacher of China Communication University who is a guest on the film channel "Today’s Film Review", the "March" of the relay Spring Festival file gives the audience greater freedom of choice, which provides great opportunities for importing foreign films, and some of them are released at the same time overseas, which deserves attention.

Marvel Comics, Dune, Kung Fu Panda, Godzilla, King Kong and other big IP leaders settled in the March film list, and the Palme d ‘Or award works and "Space Reality Shooting" movies hit hard, which attracted new expectations on the week.

Hot Movie Promotion (in chronological order)

Mrs. Spider: Super Sensory Awakening

Director:

Starring:, Sydney sweeney, celeste O ‘Connor, Isabella Merced,

Producer country: USA

Release date: March 1.

Synopsis: Cathy (Mrs Spider, Dakota Johnson), an emergency nurse, discovers that she can predict the future by accident. In the process of exploring the origin of her ability, she is closely linked with the fate of three spider women. Faced with the pursuit of Ezekiel, the villain "poisonous spider", Mrs. Spider tried to find out the reason … …

Aspect: Mrs. Spider is the most mysterious female superhero in Marvel comics. For Marvel Comics, whose reputation is declining, can the "new" hero on the screen save the decline?

Dune 2

Director:

Starring:,,, Florence Pew

Producer country: USA, Canada

Release date: March 8

Synopsis: Paul E. Cui Di (Timothée Chalamet) joins forces with Cheney (Zendaya) and freeman people to embark on the road of revenge against the conspirators who caused the destruction of his family. When faced with the choice between the love of his life and the fate of the known universe, he must try to stop the terrible future that only he can foresee.

Aspect: Continuing the previous film, the film will continue to explore the legendary journey of the dune world. At present, the film has been praised by overseas authoritative film review websites beyond its previous work. Director Villeneuve will also come to China during the film promotion period. Are you looking forward to it?

Challenge

Director:

Starring:

Producer country: Russia

Release date: March 15th.

Synopsis: An astronaut can’t return to Earth for treatment due to sudden illness, and he will die if he is not treated in time. At the same time, his life is of great significance to the country. A female surgeon was urgently sent to the universe to operate on this astronaut. The difficulties and challenges she will face far exceed her career and cognition. This is the longest "journey adventure" in her career and even her life. She bid farewell to her daughter and mother and embarked on this unknown journey. ……

Aspect: The film is known as "the first real-life film made by human beings in space", and it is worth paying attention to whether the film-history stunt can really be transformed into excellent quality.

Kung fu panda 4

Director:,

English dubbing: Jack Black,,,,

Chinese dubbing:,,

Producer country: USA, China.

Release date: March 22nd.

Synopsis: When the Dragon Warrior Po returns again, he will be forced to practice advanced by Master. A series of brand-new and strongest villains, the Phantom of the Demon, appeared on the stage, and mysteriously she can be transformed into every Po’s former enemy. This time, Po has met new partners such as Xiaozhen, and will start this adventure together.

Aspect: After eight years’ violation, the classic IP is coming again, and the new Kung Fu journey of Panda Po should not be missed. For the audience in China, the voice "performances" of Bo Huang, Yang Mi and Rulu are also worth going into the cinema to enjoy.

The trial of falling

Directed by Justin Tarie.

Screenwriters: Justin Tarie and Arthur Harari.

Starring:,, Milo machado Graner,

Producer country: France

Release date: March 29th.

Synopsis: Sandra (sandra wheeler), her husband Samuel and her visually impaired son Daniel live in a cottage in a remote mountain area with ice and snow. One day, Samuel was found dead after falling from a building outside his house. The police launched an investigation into the suspected murder, and Sandra was charged under uncertain circumstances. Is this suicide or murder? A year later, Daniel took part in the trial of his mother … …

Aspect: The film won the highest prize in Cannes Film Festival last year — — The Palme d ‘Or Award, and continues to harvest various film awards around the world, and the momentum continues to this day. Different from conventional suspense films and court films, the film deeply examines the real face of marriage and family life through these shells, with progressive emotions and subtle lens language, highlighting the pioneering expression of today’s world films on practical issues.

Godzilla vs king kong 2: The Rise of the Empire

Director:

Starring:

Producer country: USA

Release date: March 29th.

Synopsis: After the last monster high-burning battle, King Kong and Godzilla will once again join hands to fight against a huge threat lurking in the world, and gradually explore the origin of these behemoths and the mysteries of Skull Island and other places. At the same time, the veil of the ancient war will also be revealed, and it was that battle that created these extraordinary creatures and profoundly affected the fate of the human world.

Aspect: Can the sequel visually continue the shock of the previous work? In the story, will there be an upgrade without pulling the crotch? We’ll see at the cinema.

　　Chen Xinfeng, the person in charge of the ecological park, and the staff are carrying out professional leaf splitting, flower thinning and fruit thinning on the elevated strawberries to ensure the quality after listing. This is the second year that he has cultivated strawberries without soil. Compared with the traditional cultivation of strawberries, this cultivation technology has a better planting environment and greatly improved the picking experience of tourists.　

　　

Tourists pick and punch cards in the high-ridge strawberry greenhouse.　

　　"Our main varieties are ice cream strawberries, chocolate strawberries and cream strawberries. The output of each greenhouse is about 4,000 kilograms, and each kilogram can be sold to 45 yuan. From now until June, it is the peak season for picking, and the total income is expected to reach 300,000 yuan." Chen Xinfeng told reporters that the strawberries he planted were well received by the market. In addition to supplying local supermarkets, many customers in Zhengzhou and Luoyang booked them, which was in short supply.　

The person in charge introduced the situation of soilless cultivation of strawberries for tourists who came to pick them.　

　　Inspired by "elevated" strawberries, in 2024, Chen Xinfeng transformed the strawberry greenhouse into a smart agricultural greenhouse to plant "high-ridge" strawberries to improve quality and yield. In the transformation, he raised the ridge by 30 cm with steel frame, which is more suitable for the development of sightseeing and picking agriculture; Adopt intelligent drip irrigation and water circulation heating technology system to accurately control air humidity and nutrient supply, and ensure stable growth environment while saving water and fertilizer; Using physical pest control and biological control technology to replace traditional pesticides to ensure that strawberries are green and pollution-free; Equipped with automatic temperature control and light supplement equipment, so that strawberry growth is not limited by natural conditions; Pure water irrigation is used to provide high-quality and stable water source for strawberry growth and accurately meet water demand. At the same time, he also introduced the drone pollination technology of "low temperature tolerance, no flight and no shed collision", which not only improved the fruit setting rate of strawberries, but also improved the fruit quality, making the fruit shape correct and the taste sweet.　

　　Walking into the meat rabbit breeding base in Hanxi Village, Dading Street, rows of modern breeding cages are uniform, and fat meat rabbits are eating and drinking leisurely. The head of the base, Mao Xing, observed the growth of rabbits and carefully recorded them. "At present, there are 144 groups of modern breeding cages in our base, with a total of more than 3,400 meat rabbits, with an annual slaughter of more than 60,000, which can generate income of 500,000 yuan." Mao Xing happily talked to the reporter about the "rabbit breeding".　

Technicians check the growth of meat rabbits.　

　　There are only three or four workers in the clean and tidy breeding shed, thanks to the automatic breeding equipment introduced by the base. Automatic temperature control technology can adjust the temperature of the breeding shed in time, which is more suitable for the growth of meat rabbits; Set the feeding time on the computer, automatically start the feeding function at the point of arrival, and automatically cut off the power after feeding, feeding 1-6 times a day, which better caters to the physiological characteristics of rabbits with less food and more meals; The automatic excrement cleaning system can automatically clean excrement, reduce ammonia smell and flies and mosquitoes, reduce the disease probability and mortality of meat rabbits, and improve the survival rate of young rabbits. In addition, the rabbit manure is also used as agricultural fertilizer and exported to Fujian and Shaanxi, which increases the economic benefits.　

　　"This meat rabbit breeding project can also increase the income of the village collective by 100,000 yuan every year. In the next step, the two village committees will encourage interested people to learn rabbit breeding technology, so that meat rabbit breeding will become a characteristic industry in the village and a project to increase people’s income." Yao Jialian, secretary of the village party branch, introduced.　

　　The industry is prosperous, the countryside is strong and the villagers are rich. In recent years, mengzhou city has continuously intensified the adjustment of agricultural industrial structure. By increasing the popularization and application of intelligent agricultural technologies such as drones, Internet of Things and big data in agricultural production, it has changed the extensive production management mode of traditional agriculture, improved agricultural production efficiency, improved the output and quality of agricultural products, and promoted the sustainable development of agriculture.　

　　It is reported that in the next step, mengzhou city will promote agricultural modernization and intelligence by cultivating high-quality agricultural skilled talents in the new era, accelerating the application of smart agricultural technology, strengthening the guarantee of data elements, and strengthening the construction of talent teams, empowering the masses with smart agriculture, helping the rural areas to fully revitalize, and painting a new picture of a beautiful countryside with strong agriculture, beautiful countryside and rich farmers.　

　　(Guangming Daily full media reporter Michael Cui correspondent Hou Wei Chen Daoming)　

1 scope
This standard specifies the definition, technical requirements, inspection methods and inspection rules of water-saving domestic water appliances.
This standard is applicable to hot and cold water supply pipelines installed in building facilities, and the water supply pressure is not greater than 0.6MPa. Products used: water tap, toilet and toilet system, toilet flushing valve, shower, household washing machine, etc.
2 reference standard
The provisions contained in the following standards constitute the provisions of this standard by being quoted in this standard. When this standard was published, all the versions indicated were valid. All standards will be revised, and all parties using this standard should explore the possibility of using the latest version of the following standards.
GB/T　　ll76? Technical conditions of cast copper alloy in 1987
GB/T　　4288? 1992 household electric washing machine
GB/T　　6952? 1999 sanitary ceramics
GB/T　　18145? 2000 ceramic sealing water nozzle
CJ/T　　3081? 1999 non-contact (electronic) water supply apparatus
JC　　707? 1997 toilet low water tank fittings
JC/T　　856? Matching system of 2000 6 liter toilet
JG/T　　3008? Valve for mechanical pedal shower in 1993
JG/T　　3040.2? 1997 hydraulic slow-closing flushing valve for toilet flushing device
QB/T　　1334? General specification for water nozzle in 1998
QB/T　　3649? 1999 toilet flushing valve
3 definition
This standard adopts the following definitions.
3.1 water-saving domestic water appliances domest water saving devices
Devices and appliances that meet the same water consumption functions such as drinking, kitchen use, toilet cleaning, bathing and laundry, and can reduce water consumption compared with similar conventional products.
3.2 Water saving faucets (faucets)
Valve products with manual or automatic opening and closing and control of water flow at the outlet, which can achieve water-saving effect in use.
3.3 water-saving toilet
Under the condition of ensuring the hygiene requirements, use function and delivery capacity of the drainage pipeline, the toilet does not leak, and the flushing water quantity at one time is not more than 6L of water.
3.4 water saving toilet system
It consists of toilet, water tank and fittings, pipes, fittings, interfaces and installation technology. The water consumption for each flushing cycle is not more than 6L, that is, the sewage can be washed away from the trap of toilet and discharged into the product system of gravity discharge system.
3.5 water saving flushing valve for water closet
Valve products for toilet with delayed flushing, automatic closing and flow control functions.
3.6 water-saving shower water saving shower
Shower products that use contact or non-contact control to open and close, and have the functions of water temperature adjustment and flow restriction.
3.7 water saving washing machine
Taking water as the medium, the water consumption can be automatically or manually adjusted according to the amount of clothes and the degree of cleanliness, which meets the washing function and has low water consumption.
4 technical requirements
4.1 General provisions
4.1.1 Corrosive materials are not allowed to be used for the parts where the products contact with water; The surface of parts that directly affect the product life should be treated with anti-corrosion or made of materials that are not easy to corrode. The use of cast copper alloy should comply with the provisions of GB/T 1l76.
4.1.2 Products should not use materials or coatings containing harmful additives, and all materials in direct contact with drinking water should not pollute the water quality.
4.1.3 Products used in hot and humid environment should be able to be used for a long time at a temperature of less than 60℃ and a relative humidity of not more than 90% (the relative humidity of shower is not more than 95%), and have no adverse effects on human body and no pollution to the environment.
4.1.4 If it is an electronically controlled product, its electrical performance shall comply with the relevant provisions of CJ/T 3081.
4.2 Water-saving nozzle
4.2.1 The product shall have a water pressure of 0.1 MPa and a pipe diameter of 15mm, and the maximum flow rate shall not be greater than 0.15 L/s..
4.2.2 Inductive nozzles and delayed self-closing nozzles shall comply with the provisions of 4.2.1.
4.2.3 After leaving the service state, the induction water nozzle should automatically stop water within 2s, and it should automatically stop water under abnormal power supply voltage.
4.2.4 Time-delay self-closing nozzle water supply is not more than 1L at a time, and the water supply time is 4s～6s ~ 6 s..
4.2.5 The strength of the valve body of the ceramic-piece sealed water nozzle shall meet GB/T 18145? The provisions of 6.4.1 in 2000.
4.2.6 The strength of the valve body of the non-ceramic-piece sealed water nozzle shall meet QB/T 1334? The provisions of 5.4.1 in 1998.
4.2.7 The strength of the valve body of the induction nozzle shall meet CJ/T 3081? The provisions of 6.6 in 1999.
4.2.8 The sealing performance of the ceramic-piece sealed water nozzle shall comply with GB/T 18145? The provisions of 6.4.2 in 2000.
4.2.9 The sealing performance of non-ceramic sealed water nozzle shall comply with QB/T 1334? The provisions of 5.4.2 in 1998.
4.2.10 The sealing performance of the valve body of the induction water nozzle shall comply with CJ/T 3081? The provisions of 6.6 in 1999.
4.2.11 The service life of the switch of the product shall meet the following requirements:
A) the induction nozzle is more than 50,000 times;
B) The ceramic-sheet sealed water nozzle has been used for more than 200,000 times;
C) Other types of water taps are more than 300,000 times.
4.2.12 Other requirements for products shall be in accordance with relevant provisions in GB/T 18145, QB/T 1334 and CJ/T 3081.
4.3 Water-saving toilet system
4.3.1 The product should adopt the structure of washing urine and urine in stages.
4.3.2 The water consumption for defecation flushing in each flushing cycle of the product shall not be greater than 6L.
4.3.3 If the fittings for toilet flushing are adopted, the water consumption for urine flushing shall not be greater than 4.5L.
4.3.4 Flushing function
4.3.4.1 should meet the following requirements under the condition that the total flushing water consumption is not more than 6L:
A) Solid discharge: polypropylene ball method is adopted, and the average number of balls passing through three times is not less than 75;
B) After each washing, the ink line method is adopted, and the total length of accumulated residual ink marks is not more than 50mm；;
C) The water seal depth and water seal recovery are not less than 50mm；;
D) The dilution rate after sewage discharge test shall not be less than 100.
The transportation characteristics of 4.3.4.2 drainage pipeline shall meet one of the following conditions:
A) Rinse continuously for 30 times, at least 24 times, and all 4 samples are washed out, and the average of 24 times.
B) All four specimens rushed out of the toilet and rushed into the sewage riser through the 5m horizontal pipe.
4.3.4.3 Trap should be able to pass φ 40mm solid ball.
4.3.5 The water absorption rate of the ceramic toilet is not more than 1.0%.
4.3.6 Water tank fittings shall meet the following requirements:

A) The operating mechanism is stable and reliable, and easy to operate. Flexible action, no jam.
B) The strength and sealing performance of the inlet valve shall meet the first-class requirements specified in JC 707.
C) Under the water supply pressure of 0.05MPa, the water inflow time is not more than 120s.
D) The spillway must be 20mm higher than the effective working water surface.
E) The outlet of the inlet valve should be 20mm higher than the overflow pipe.
F) There should be no leakage in the drain valve.
G) When the effective water volume of the water tank is 6L, the drainage flow of the drain valve should not be less than 2.0L/s..
H) The service life is more than 50,000 times.
4.3.7 All parts of the water-saving toilet system (toilet, water tank and fittings, pipes, fittings, interfaces, etc.) shall comply with the provisions in GB/T 6952, JC 707 and JC/T 856, and there shall be no leakage at each joint after assembly.
4.3.8 The water-saving toilet system must comply with JC/T 856? Design, construction and installation of pipeline system according to 4.6 in 2000.
4.3.9 Other requirements for products shall comply with relevant provisions in GB/T 6952, JC707 and JC/T856.
4.4 Water-saving toilet flushing valve
4.4.1 When the water pressure is 0.3MPa, the product used for defecation flushing has a flushing volume of 6L ~ 8L at a time. The primary flushing volume of urine flushing products is 2L ~ 4L (if it is divided into two stages, it is the sum of the first stage and the second stage). The flushing time is 3s ~ 10s.
4.4.2 The strength of the valve body shall reach the pressure of 0.9MPa for 30s without deformation or leakage.
4.4.3 The sealing performance of the valve body shall be 0.6Mpa at high pressure and 0.04Mpa at low pressure respectively, and there shall be no leakage on all sealing surfaces and connecting surfaces.
4.4.4 The service life of the product shall be more than 50,000 times.
4.4.5 The product must have an anti-siphon device in use (this requirement is not considered for the urine flushing valve).
4.4.6 The product is not allowed to have obvious water hammer phenomenon in use, and the noise sound pressure level is not more than 60dB.
4.4.7 Other requirements for products shall comply with relevant regulations in JG/T 3040 and QB/T 3649.
4.5 water-saving shower
4.5.1 The outlet flow of the shower valve of the product shall comply with JG/T 3008? The provisions of 4.7 in 1993.
4.5.2 The shower nozzle should be under the water pressure of 0.1MPa and the pipe diameter of 15mm, and the maximum flow is not more than 0.15 L/s..
4.5.3 The compressive strength of the shower valve body should reach 1.5 times the nominal pressure of the product and keep the pressure for 30s, without deformation, cracking and leakage.
4.5.4 When the shower valve is naturally closed, water with 1.1 times the nominal pressure of the product is introduced, and there should be no leakage at the water outlet and valve stem seal. Seal the water outlet, and let the water with pressure of 0.1MPa pass through the water inlet, and there should be no leakage at the valve stem seal.
4.5.5 Public bathrooms should adopt single-tube thermostatic products.
4.5.6 The service life of the shower valve of the product shall be more than 50,000 times.
4.5.7 Other requirements for products shall comply with relevant regulations in JG/T 3008.
4.6 water-saving washing machine
4.6.1 The ratio of the rated washing water volume to the rated washing capacity of the product shall comply with GB/T 4288? The provisions of 5.4 in 1992.
4.6.2 The rinsing performance of the product shall be such that the alkalinity of the residual rinsing liquid phase on the washings for the test water is not greater than 0.04×10-2mol/L (molar concentration).
4.6.3 When the product is at the maximum load washing capacity, high water level and a standard washing process, the washing ratio is above 0.8, and the water consumption per unit capacity is not greater than the following values:
A) The drum washing machine has a heating device of 14L/kg and no heating device of 16L/kg；;
B) pulsator washing machine 22L/kg.
4.6.4 Other requirements for products shall comply with relevant provisions in GB/T 4288.
5 inspection method
5.1 Water-saving nozzle
5.1.1 Determination of flow rate
According to GB/T 18145? Test method of 7.4.3 in 2000.
5.1.2 Determination of primary water supply and water supply time of delayed self-closing nozzle
A) test device and instrument:
? Nozzle pressure testing machine (pressure and flow measurement accuracy 0.5).
? Stopwatch, measuring cylinder.
B) Test methods and steps:
? Install the time-delay self-closing water nozzle on the testing machine.
? Connect the water source, open the water tap, measure the water supply quantity and water supply time once with a simple dosage and a stopwatch, and take the average value for three times.
5.1.3 Detection of valve body strength
5.1.3.1 ceramic sealed water nozzle according to GB/T 18145? 7.4.1 in 2000.
5.1.3.2 non-ceramic sealed water nozzle according to QB/T 1334? 6.9 in 1998.
5.1.3.3 induction nozzle press CJ/T 3081? 7.3.1 in 1999.
5.1.4 Detection of sealing performance
5.1.4.1 ceramic sealed water nozzle according to GB/T 18145? 7.4.2 in 2000.
5.1.4.2 non-ceramic sealed water nozzle according to QB/T 1334? In 1998, the test was carried out as specified in 5.4.5.
5.1.4.3 induction nozzle press CJ/T 3081? 7.3.2 in 1999.
5.1.5 Switch life test
The service life of 5.1.5.1 ceramic sealed faucet switch is in accordance with GB/T 18145? In 2000, the regulations of 7.4.4.3 were tested.
The service life of non-ceramic sealed faucet switch in 5.1.5.2 is according to QB/T 1334? 5.4.5 in 1998 stipulated that the test should be carried out.
The service life of 5.1.5.3 induction water tap switch is in accordance with CJ/T 3081? In 1999, the test was carried out as specified in 7.2.4.
5.2 Water-saving toilet system
5.2.1 Test method
Connect the product to the water supply pipeline in use, turn on the flushing device under the condition that the static pressure is 0.14MPa and the dynamic pressure is not less than 0.10MPa, and check that there is no leakage in each connection part during a flushing cycle, and the water consumption can be adjusted to not more than 6L.
5.2.2 Flushing function
Under the conditions described in 5.2.l, carry out the following inspection.
5.2.2.1 solid emission inspection
100 φ 19mm polypropylene ball with bulk density of 0.85 g/cm3 ~ 0.90 g/cm3, put it gently into the toilet with full water seal, open the drain valve to flush with water, check and record the number of balls rushing out of the toilet, measure it three times in a row, and calculate the average number of balls rushing out of the toilet three times.
5.2.2.2 ink line test
Wipe the cleaning surface dry, draw a circle of ink lines along the cleaning surface 25mm below the toilet seat with a soft pen, flush immediately, and measure and record the length of ink lines remaining on the cleaning surface.
5.2.2.3 water seal depth and water seal recovery inspection;
A) the water seal depth shall be measured according to GB/T 6952? 6.7.1 in 1999.
B) water seal recovery measurement. During the solid discharge inspection (see 5.2.2.1), observe the water seal recovery after flushing, and if there is overflow at the sewage outlet, it indicates that the water seal is fully recovered. If there is no overflow, measure the remaining water seal depth and record it.
5.2.2.4 sewage discharge test according to GB/T 6952? 6.8 in 1999.
Test of conveying characteristics of drainage pipes in 5.2.2.5;
A) for the provisions of 4.3.3.2a), according to GB/T 6952? In 1999, the method specified in Appendix C was tested for 30 times, and the number of samples washed out each time, the total flushing water volume and the subsequent flushing water volume were recorded.
B) For the provisions of 4.3.3.3b), the inner diameter is φ 100mm drain pipe, the length of the drain pipe is 5m, and the downstream slope is 2.6%. When the toilet socket pipe is connected with the horizontal pipe, a 90 elbow is adopted, and the distance from the toilet outlet to the center of the horizontal pipe is 450mm. After the toilet products installed in use state are connected with the drainage pipe system without leakage, the toilet should be installed according to JC/T 856? Inspection specified in 5.1.6 in 2000.
The minimum pipe diameter of 5.2.2.6 trapway is tested according to GB/T 6952? In 1999, the provisions of the 6.7.2 for inspection.
5.2.3 The water absorption rate of the ceramic toilet is in accordance with GB/T 6952? The provisions of 6.5 in 1999 were tested.
5.2.4 The requirements of water tank fittings shall be inspected according to the relevant provisions of JC 707.
5.3 Water-saving toilet flushing valve
5.3.1 Determination of flow rate
A) test device and instrument:
? Flushing valve flow tester (pressure and flow measurement accuracy 0.5).
? Stopwatch, measurement Jane.
B) Test conditions: The pipe diameter specification of the water supply pipeline in front of the valve should take the previous specification size of the water inlet of the valve. The product specifications for the test are DN25, DN20 and DN15 respectively.
C) test methods and steps:
? Adjust the valve to the maximum flushing volume.
? Under the pressure of 0.3MPa, the flushing quantity and flushing time were measured for 3 times each, and the average value was taken.
5.3.2 Detection of valve body strength
A) Test device and instrument: flushing valve hydraulic strength tester (pressure measurement accuracy is 0.5) and stopwatch.
B) Test methods and steps:
? Connect the water inlet end of the valve with the water supply end of the testing machine according to the installation position of the valve.
? Close the disc, gradually increase the pressure to 0.9MPa, and maintain the pressure for more than 30s. Observe whether there is pressure drop on the pressure gauge, and check whether there is deformation and leakage on the valve body and joint. It is allowed to proceed with a single part.
? In case of pressurized leakage, allow the discharge to exhaust the residual gas in the valve before continuing the test.
5.3.3 Detection of sealing performance
A) Test device: flushing valve hydraulic sealing tester (pressure measurement accuracy is 0.5).
B) Test methods and steps:
? Install the valve at the water supply end of the testing machine according to the working state of the valve.
? When the pressure is 0.04MPa and 0.6MPa respectively, the flushing valve is drained, and there should be no leakage after self-closing. Repeat the opening and closing test for three times.
5.3.4 Life test
A) Equipment: Flushing valve life tester (pressure measurement accuracy is 0.5).
B) Test methods and steps:
Install the product to be tested on the testing machine, and connect the water supply pipeline. The water supply pressure is: dynamic pressure 0.3MPa, water temperature ≤ At 50℃, after opening the valve core and self-closing, one action is completed, and the strength and sealing performance of the valve body are tested after reciprocating for 50 000 times.
5.3.5 Anti-siphon test
A) Test equipment and devices: as shown in Figure 1.
B) test conditions:
? Flushing valve with upper sealing structure shall be padded with φ 0.4mm～φ 0.8mm wire.
? The length of the transparent flushing pipe is not less than 500mm, and the submerged part is 100mm.
C) test methods and steps:
? Start the vacuum pump to make the vacuum degree of the pressure supply system not less than 0.08MPa.
? Open the valve to communicate the flushing valve with the water storage tank.
? Open the valve and observe whether there is backwater in the flushing pipe, and record the backwater height (the liquid level of the transparent flushing pipe is not higher than the liquid level of the container by 300mm).
5.3.6 Noise test.
The product is installed according to the state of use, the sound pressure level of ambient noise is not more than 15dB, and the inlet pressure is 0.1MPa and 0.6MPa respectively, and the noise measured at the distance from the valve body lm and higher than lm is the maximum of two times.
5.4 water-saving shower
5.4.1 Determination of flow rate
The flow of shower valve made in 5.4.1.1 shall be determined according to CJ/T 3008? In accordance with the provisions of article 5.5 of 1993.
Determination of shower nozzle flow in 5.4.1.2
A) equipment: CJ/T 3008? Water passing test system shown in Article 5.1.2 of 1993.
B) Test methods and steps:
? Connect the shower nozzle and the water test system with a pipe with a diameter of 15 mm.
? The shower valve is opened by water supply, and the shower is in use.
? Adjust the water inlet pressure of shower nozzle to 0.1MPa.
? Determine the unit time flow value.
5.4.2 The compressive strength of valve body shall be tested according to CJ/T 3008? Article 5.6 of 1993 stipulates that.
5.4.3 The sealing performance of valve body shall be tested according to CJ/T 3008? Article 5.7 of 1993 stipulates that.
5.4.4 Life test
Test the service life of shower valve body according to CJ/T 3008? The provisions of article 5.8 of 1993.
5.5 water-saving washing machine.
5.5.1 The ratio of rated washing water volume to rated washing capacity shall be in accordance with GB/T 4288? The provisions of the 6.3 calculation in 1992.
5.5.2 The washing ratio shall be determined according to GB/T 4288? In 1992, the test method specified in Appendix A was carried out.
5.5.3 The rinsing performance shall be tested according to 4.6.2 of this standard and GB/T 4288? In 1992, the test method in Appendix C was carried out.
5.5.4 Determination of water consumption per unit capacity
Determine the washing ratio according to the provisions of 5.5.2. Under the condition that the rated washing capacity and the highest water level of the washing machine to be tested complete the washing, rinsing and dehydration washing processes set by a washing machine program, the water consumption per unit capacity is calculated by Formula (1):
W=W1/M… … … … (1)
Where: w? ? Water consumption per unit capacity, l/kg;
W1? ? Total water consumption in a standard washing process of washing, rinsing and dehydration, l;
M? ? Rated washing capacity of washing machine, kg.
6 inspection rules
6.1 Water-saving faucet (faucet)
6.1.1 The ceramic sealed water nozzle conforms to the provisions of GB/T 18145.
6.1.2 Non-ceramic sealed water nozzle meets the requirements of QB/T 1334.
6.2 The inspection rules of urinal, water tank and fittings in water-saving urinal system shall be in accordance with GB/T 6952, JC 707 and JC/T856.
6.3 Water-saving toilet flushing valve meets the requirements of QB/T 3649.
6.4 The inspection rules of shower valve body conform to JG/T 3008.
6.5 The water-saving washing machine conforms to the provisions of GB/T 4288.

　 　 　 　Only by reading this sentence, other friends must be very clear — — I’ve lost everything in this battle of pretending to be X. And this brother who posted it was nicknamed "Red Wall Brother" and "Terran Emperor" by others.

　 　 　 　In order to cooperate with the ridicule of other bar friends, Brother Red Wall himself has posted many times. It seems that he is "one-sided" but actually ridicules his response, which is a good show for many musicians.

　 　 　 　It is also the incomparable classic reply of Brother Red Wall, which gradually spread from the post bar and even spread to every corner of the Internet. Even when I was watching League of Legends World Series, I couldn’t escape the attack of the red wall sentence.

　 　 　 　Just when RNG was at T13: 0, a few bullets floated past, which made me feel a little sad at once.

　 　 　 　It seems that in just one night, this reply has become the famous stem of a hot Internet — — But even if a stalk is interesting, it will naturally rot if you talk too much.

　 　 　 　Soon, some people said that they felt uncomfortable at the sight of this sentence, and there was quite a case of "Juezi allergy" recurring. Brother Red Wall himself even replied, saying that he really didn’t expect such a ridicule to become like this, but now his brother’s post account seems to have been cancelled — — The appearance of "Brother Red Wall" was quite abrupt, which made people somewhat caught off guard, and this departure was even more surprising.

　 　 　 　However, it is also the time when the classic reply of Brother Red Wall triggered the imitation of the whole network. This post about the competitive power of giant red fish seems to have been completely ruined. The following is full of imitators of Brother Red Wall and similar sentences.

　 　 　 　But some people have new inspiration after this. Since "Wang Feng is here" can have a typical example like Brother Red Wall, why can’t other brothers who post it show their strength under this power post?

　 　 　 　For example, just let the elder brother of the fishing bar wave the fishing rod a few times. According to the theorem of "the fisherman will always be in the air force" and "the fisherman will do everything except fishing", this red fish quickly evacuated in order not to be transferred.

　 　 　 　What’s more, I think that only some brothers need to show their XP system, so that the fish can turn around and escape.

　 　 　 　Although Brother Red Wall’s reply has been widely circulated in just a few days, it has great potential to become the next "rotten stalk of the whole network", but some friends’ speeches are quite pertinent.

　 　 　 　After all, nowadays, when we talk about post bars, we will think of many sentence patterns full of rage and aggression. This sentence from Brother Red Wall is not only quite mild, but also just a joke with no practical significance.

　 　 　 　Of course, this red fish post can get widespread attention in "Wang Feng is in the bar", and even set off a discussion upsurge of the whole post bar, mainly because of the traditional culture of this post bar.

　 　 　 　Just listen to the name, I think many people will pop up many question marks: Wang Feng? Is Wang Feng here? This is a fan of singer Wang Feng, right? Why do you discuss these strange contents?

　 　 　 　But in fact, this post has nothing to do with Wang Feng himself. The reason why it has such a name is only because the original bar owners ID was "Wang Feng is here". The traditional culture of the whole post bar is: cross-border combat power competition regardless of region.

　 　 　 　For example, this ladder map of combat power, which is the most widely circulated in Wangba, can fully reflect the hobbies of these old friends, although it has different expressions with the "version update" and the selfishness of some bar friends.

　　Whether the safe-haven value of gold still exists or not has become a hot topic of concern to many market investors. From a fundamental point of view, the price of gold must prove that the annual increase of 1.7% still exists, but the long-term fundamental supply and demand are being questioned and challenged.

　　Chimp Investor columnist Peter Elston mentioned that he considered what he could learn from the long-term price trend of gold, the so-called technicality. The final conclusion is that although the inflation-adjusted return of gold may still be poor in absolute value in the short term, it may still be better than that of stocks, bonds and cash, especially if the inflation rate remains high in the next few years.

　　He also suggested that in the past 50 years, the inflation-adjusted annual appreciation trend of gold price should remain unchanged at 1.7%, because the growth rate of global real wealth may continue to exceed this value. However, this is too simplistic and assumes that the fundamental reason for buying gold will not change much, which should be challenged.

　　This article focuses on the root cause of gold’s popularity, its supply dynamics, and its fundamentals, to see if they still prove that the above historical trend, the actual price increase of 1.7% per year still exists.

　　Gold is an iron-loving element, which means that it is heavy, easy to dissolve in iron, and doesn’t like to combine with oxygen. The oxide of gold is actually thermodynamically unstable. Therefore, its concentration is higher in the deep core and mantle than in the crust. Compared with the very low occurrence rate of the whole crust, the exploitable gold deposits are even rarer. In addition, the mineable deposits have now been exhausted, so that the annual output of gold has been flat since 2016. In the absence of major changes in mining technology and/or a drop in energy prices, this slowdown in annual output may continue.

　　The chemical inertness of gold makes it very suitable for jewelry, electronic products, dentistry, aerospace and value storage as gold bars and coins. The World Gold Council estimates that by the end of 2021, 205,238 tons of gold have been discovered/mined in the past 6,000 years, and the proven unexploited reserves total 53,000 tons, the latter figure is lower than 54,000 tons in 2019. It is also estimated that there are 15,000 tons of gold dissolved in the world’s oceans, equivalent to about 10 parts per trillion.

　　It is the inertia and rarity of gold that endows it with intrinsic value, that is, its practicality and practicality. Warren Buffett once wrote a famous saying that gold is dug out of the ground in Africa or somewhere, and then we melt it, dig a hole, bury it, and then pay people to stand around and guard it. It is not practical, and anyone who watches it from Mars will be puzzled.

　　But Elston doubts that Buffett will shine in the short term, but he will surely see that many people have done so for thousands of years and will almost certainly continue to do so. Besides, if he has a mobile phone or a tooth filling, he may benefit from the utility of gold to a greater extent than he is willing to mention.

　　As for the use breakdown of 205,238 tons of above-ground inventory, jewelry accounts for 46%, privately owned gold bars, coins and ETFs account for 22%, the central bank accounts for 17%, and other uses such as electronics, dentistry and aerospace account for 15%. It is estimated that as much as 80% of the newly mined or recycled gold is used for jewelry manufacturing.

　　Looking forward to the future of gold, it needs to be clear that Elston is not interested in the factors that may affect the short-term price performance of gold. They are essentially emotional-driven and unpredictable. In addition, compared with the long-term possible percentage change, the short-term performance is insignificant.

　　In other words, the really important factors are those related to basic supply and demand. They will determine the long-term performance of inflation-adjusted gold prices. For example, whether it will increase by 300% or decrease by 75% in the next decade. In his view, this is exactly what the market should pay attention to, not whether the nominal price of the US dollar will fall below $1,500 in the next few weeks.

　　As mentioned above, the annual gold production has been declining and has been flat since 2016. Environmental problems limit the potential of new discoveries. The progress of mining technology is related to the use of unmanned aerial vehicles, virtual reality, self-driving cars and blasting optimization. They didn’t, in fact, solve the basic law in a meaningful way, that is, the deeper you want to dig, the more energy you need.

　　Although 75% of the annual gold demand is met by mining gold supply, the shortage is made up by recycling, mainly jewelry. In the short term, the supply of recycled gold is sensitive to the price of gold. In addition, the dynamics behind the basic supply of recycled gold are unlikely to change significantly.

　　About 6000 years ago, the first known use of gold was as decorative beads. It is hard to see how this established popularity will fundamentally change. According to the data of the World Bank, since 1971, the real GDP of the world has increased by 3.1% every year, while the appreciation trend of the real gold price in the same period is 1.7% every year. Generally speaking, in the past 50 years, the world’s real GDP has increased by 360%, which is 130% higher than the real gold price. In other words, the rise of gold prices in the past 50 years has been supported, proved and explained by the growth of global wealth.

　　In recent years, the net purchase of gold by central banks has been quite stable, with an average of about 500 tons per year. The use of gold, whether as jewelry or as a means of value storage, is inseparable from its chemical characteristics. Therefore, it seems unlikely that central banks will lose interest in holding physical gold in their vaults in the near future or even the distant future. Net purchases may vary from quarter to quarter, sometimes very different, but the long-term trend seems to have been established.

　　The demand for private investment in gold is probably the most interesting of the four main sources. Its utility as a private value store is similar to that of the central bank, that is, it is related to its chemical properties. However, economies of scale make it expensive and/or risky for private individuals to store gold at home, so most people hold gold in paper form, that is, certificates and ETFs. Proponents of cryptocurrency have seized this obvious inefficiency, claiming that things like bitcoin should be regarded as digital gold, thus invalidating the current utility of gold as a private sector value store.

　　The use of gold as jewelry and storage of private and public values is inseparable from its chemical characteristics, in other words, the demand for gold bars goes hand in hand with the demand for jewelry. Bitcoin and other cryptocurrencies don’t have such basic attributes, and they never will. A USB flash drive storing encrypted access codes is unlikely to be worn as jewelry. Unless, of course, they are made of gold.

　　Elston said that the most interesting reason for the demand for private investment is that in difficult economic times, gold may be sold to buy more necessities, thus putting downward pressure on prices. However, in the severe economic difficulties, due to high inflation, people lose confidence in legal paper money, and the demand for it as a means of value storage will increase.

　　He is not sure whether he wants to live in a world where gold has replaced paper money as the main currency, but this does not mean that economic difficulties will continue but increase gradually in the long run. For example, global temperature rise, war, famine and epidemic diseases will not lead to the appreciation of gold prices.

　　Describe the various ways of gold, namely, value storage, inflation hedging, safe haven and investment. As should be clear, value storage is something that actually keeps its value. Gold has always been a means of value storage, and its inflation-adjusted price has shown an upward trend in the past 50 years. However, if you bought gold in 1981, you are actually still underwater. In other words, the actual decline of gold may exist and has existed for a specific period of several decades.

　　The reputation of gold as an inflation hedge tool was established in 1970s, 1980s and 1990s, but the relationship has not been obvious since then. It is true that in naughty times, when inflation fell, the real price of gold rose by more than 400%. Therefore, Elston is not sure whether the argument that gold is an inflation hedging tool is valid, except in severe economic difficulties, such as the use of hyperinflation in Germany.

　　Is gold a safe haven, that is, defensive? In other words, when risky assets such as stocks and high-yield bonds perform poorly, does it perform well? Similarly, there is no real evidence that this is indeed the case. It has not performed well this year, which is a period of poor performance of risky assets.

　　Finally, Elston never considered physical gold as an investment. This is because physical gold is different from stocks, bonds or property, and the former does not actually generate income. It is more similar to cash, and the portfolio allocation of physical gold should be regarded as a cash substitute. He finally stressed that this does not mean that high cash distribution is appropriate, and gold should be more popular as cash than legal tender.

　　At present, China’s agricultural and rural economic development has entered the best historical period, and grain production has achieved "11 consecutive increases", which has been stable at more than 1.2 trillion Jin for two consecutive years. At the same time, it has made great achievements and paid a huge price. The string of resource utilization is getting tighter and tighter, and the carrying capacity of the ecological environment is getting closer and closer to the limit. Facing the double "curse" of resource conditions and ecological environment, it is urgent to change the mode of agricultural development, strengthen the control of agricultural non-point source pollution, effectively promote the protection and control of agricultural ecological environment and promote the sustainable development of agriculture.

　　First, scientific graspAgricultural non-point source pollution situation, and effectively enhance the sense of urgency and responsibility of agricultural non-point source pollution prevention and control work.

　　The first national pollution survey showed that in 2007, the chemical oxygen demand (COD), total nitrogen and total phosphorus emissions from agricultural sources in China reached 13.2 million tons, 2.7 million tons and 280,000 tons respectively, accounting for 43.7%, 57.2% and 67.4% of the total national emissions respectively. Among them, livestock and poultry breeding sources account for 96% of agricultural source COD, and are the main "contributors" of agricultural non-point source pollution. Agricultural chemicals such as livestock and poultry, aquaculture, chemical fertilizers, pesticides and agricultural films are the main sources of pollution. Different from industrial point source pollution directly entering the water body through centralized sewage outlets, agricultural non-point source is decentralized, and its pollution process is not a simple direct causal relationship from agricultural production behavior to discharge, and finally to environmental impact. The research shows that 35% of nitrogen in farmland chemical fertilizer in China is utilized by crops in the current season, and most of the rest is retained in farmland soil, and a small amount flows into ditches, and finally less than 5% enters the surface water body through runoff. Therefore, although the total amount of agricultural source pollutants discharged in China is relatively high, the amount that actually enters the water body is still very limited.

　　At present, the situation of agricultural non-point source pollution is generally grim, but there are also some particularities, which require us to make careful judgments and make precise policies.

　　First, the intensive degree of aquaculture is getting higher and higher. Due to the low resource utilization rate of livestock manure and other wastes, pollution emissions are on the rise.In recent years, the total amount of livestock and poultry breeding in China has been increasing. In 2013, the number of live pigs slaughtered in China exceeded 700 million. At the same time, the scale and intensification have developed rapidly, and the proportion of large-scale breeding of more than 500 pigs per year has reached 40.8%. At the same time, the construction of livestock waste treatment facilities is relatively backward, and a large amount of livestock manure is difficult to be treated and utilized in time, which makes livestock waste change from traditional farmyard manure to pollutants. In addition, the scale of aquaculture in China is also expanding rapidly. In 1978, the total amount of aquatic products was 4.654 million tons, of which artificial aquaculture accounted for 26.1%. In 2013, the total amount of aquatic products reached 61.72 million tons, accounting for 73.6%. A large number of bait and fish medicine were put into aquaculture, which caused water pollution.

　　Second, the amount of chemical fertilizer used in the main grain crops is basically reasonable, and the phenomenon of excessive application of economic crops such as vegetables and melons is more prominent. On the whole, the growth rate of chemical fertilizer consumption is declining, but the amount of chemical fertilizer input is still too large.In 2013, the amount of chemical fertilizer used in China was 59.12 million tons, accounting for 35% of the world. Based on 2.03 billion mu of cultivated land, the average amount of chemical fertilizer used per unit area reached 436.8 kg/ha, which was far higher than the world average. It is worth pointing out that at present, the average amount of nitrogen fertilizer used in China’s main grain crops is about 212 kg/ha, which is lower than the upper limit of environmental safety (the upper limit of safety set by developed countries for preventing water pollution is 225 kg/ha), but the average amount of nitrogen fertilizer used in fruit trees and vegetables is far higher than the environmental safety requirements, and the phenomenon of excessive application of chemical fertilizers in orchards and protected vegetables is still prominent.

　　Third, the use of pesticides per unit area is higher than the world average, but lower than that of developed countries such as the United States. The overall usage tends to be stable, but the utilization rate is low.In recent years, the amount of pesticides used in China has stabilized at about 320,000 tons (active ingredients), accounting for 1/7 of the total amount of pesticides used in the world, which is higher than the proportion of China’s land area to the world’s cultivated land area, which is related to the high land multiple cropping index in China. Generally speaking, China’s pesticide consumption per unit area is higher than the world average, but lower than that of developed countries such as the United States, Israel and Japan. On the other hand, at present, the utilization rate of pesticides in China is low, only 35%. Residual pesticides enter water bodies through precipitation, surface runoff and soil infiltration, which will lead to the deterioration of soil and water environment quality, destroy ecology and affect biodiversity.

　　Fourth, the recovery rate of plastic film is low, and the problem of residual old agricultural film still needs to be solved.China’s total use of plastic film and crop coverage area rank first in the world. In 2013, the consumption of agricultural film in China was 2.493 million tons. Due to the extensive use of ultra-thin plastic film and the lack of recycling technology and mechanism of residual film, the "white revolution" gradually evolved into "white pollution", and the problem of residual pollution of farmland plastic film became increasingly prominent. Plastic film residue is serious, affecting soil structure and reducing cultivated land quality; Affect the emergence of seedlings, resulting in reduced production; Affect the operation of agricultural machinery, resulting in a decline in the quality of sowing and fertilization; Livestock eating by mistake occurs constantly, which is harmful to livestock health.

　　Fifth, the comprehensive utilization rate of crop straw is low, and the recycling capacity needs to be improved urgently.Crop straw is a versatile agricultural resource. It is estimated that in 2013, the total output and collectable amount of straw in China were 964 million tons and 819 million tons, respectively. The actual utilization amount was about 622 million tons, and the comprehensive utilization rate was only 76%. With the change of agricultural energy structure, the proportion of crop straw in domestic energy is less and less. The way out for excess straw is: firstly, burning on the spot will cause air pollution, reduce atmospheric visibility, hinder traffic and endanger human health; Second, abandoned fields or piled into rivers or lakes, after weathering, rain and decay, the organic matter in straw enters the water body and causes pollution.

　　Generally speaking, with the continuous improvement of agricultural intensification and the rapid development of aquaculture in China, the problem of agricultural non-point source pollution caused by excessive use of agricultural inputs such as chemical fertilizers and pesticides and unreasonable disposal of agricultural wastes such as livestock manure, crop straws and farmland plastic film residue has become increasingly prominent, which seriously restricts the sustainable development of agriculture and rural economy. Therefore, strengthening the control of agricultural non-point source pollution is a realistic need to ensure the safety of agricultural products, realize China’s food security and quality safety of agricultural products, and is an internal need to improve the agricultural ecological environment, accelerate the transformation of agricultural development mode and realize the sustainable development of agriculture. We must scientifically grasp the increasingly serious situation of agricultural non-point source pollution, deeply understand the great significance of strengthening the control of agricultural non-point source pollution, and earnestly enhance the sense of urgency and responsibility in our work.

　　Two, the agricultural ecological environment protection and governance work has made positive progress, laying a solid foundation for the prevention and control of agricultural non-point source pollution.

　　Agricultural non-point source pollution in China is a long-term accumulation, which has its particularity and complexity. It can’t be completely solved overnight, and it needs a long period of unremitting efforts. In recent years, while ensuring the development of agriculture, agricultural departments at all levels have continuously increased the protection and governance of agricultural ecological environment, initially established a team of agricultural non-point source pollution prevention and control and expert support teams, and gradually established and improved the policy system, exploring and forming a number of practical technologies and typical models, which have laid a good foundation for the fight against agricultural non-point source pollution.

　　First, the construction of the system team has been continuously strengthened.A four-level agricultural environmental protection management system has been formed, with two state-level main stations as the leader, 33 agricultural environmental protection stations in provinces, autonomous regions, municipalities directly under the Central Government and cities under separate state planning as the main body, and 326 prefecture-level stations and 1794 county-level stations as the basis, which provides a team system guarantee for agricultural ecological environment monitoring and prevention and control.

　　Second, the monitoring and early warning capabilities have been continuously improved.A national agricultural non-point source pollution monitoring network has been initially established, and the normal and institutionalized operation of agricultural non-point source pollution monitoring has been continuously promoted; A four-level cultivated land quality monitoring network at the national, provincial, municipal and county levels has been established, and an annual report on national cultivated land quality monitoring has been issued; An environmental monitoring network system covering China’s offshore bays, islands and reefs, beaches, nature reserves, aquatic germplasm conservation zone and aquaculture waters has been initially formed, and the Bulletin on Fishery Ecological Environment in China has been issued regularly. A national monitoring network for pollution of agricultural products was established to carry out heavy metal pollution investigation in the producing areas.

　　Third, vigorously promote the scientific application of chemical fertilizers and pesticides.Comprehensively popularize the technology of soil testing and formula fertilization, with the promotion area reaching 1.4 billion mu; In-depth implementation of green prevention and control, the establishment of 150 national green prevention and control demonstration zones, the gradual elimination of 33 kinds of highly toxic pesticides, and vigorously promote the use of high-efficiency, low-toxicity, low-residue and biological pesticides; Carry out the integration of specialized unified prevention and control of crop pests and diseases with green prevention and control, promote pilot construction, and establish 218 demonstration bases; At the beginning of 2015, the Action Plan for Zero Growth of Fertilizer and Pesticide Use by 2020 was issued, and the zero growth of fertilizer and pesticide use was initiated.

　　Fourth, actively promote pollution prevention and control of livestock and poultry breeding.Accelerate the standardization of livestock and poultry breeding, create 3,397 standardized demonstration sites, and effectively improve the level of pollution prevention and control of livestock and poultry breeding; Start the pilot project of comprehensive utilization of livestock and poultry waste; Develop rural biogas projects according to local conditions and improve the sewage treatment capacity of rural farming manure.

　　The fifth is to carry out comprehensive utilization of straw in depth.Implement the comprehensive utilization project of straw, focusing on supporting Beijing-Tianjin-Hebei and other areas to carry out straw returning to the field, raising livestock, straw biogas, straw replacing wood, straw carbonization and other work; We will start the construction of a demonstration area for full quantitative utilization of straw at the township level in Beijing, Tianjin and Hebei, and accelerate the scale and industrialization of straw utilization.

　　Sixth, efforts should be made to solve the pollution of farmland residual film.Revise the standard of plastic film to solve the problem that residual film is easy to break and difficult to recycle; For four consecutive years, the agricultural cleaner production demonstration project focusing on the recycling of waste plastic film was implemented, and the plastic film recycling and processing system was initially established; Arrange subsidies for dry farming technology such as plastic film mulching in northwest and north China to promote the popularization and application of high-standard plastic film; The comparative test of degradable plastic film was started, and the degradable plastic film with good application effect was screened for demonstration and popularization.

　　Seventh, work together to promote the demonstration construction of comprehensive management of agricultural environment.A typical driving system of modern eco-circular agriculture has been formed, which consists of 1 eco-circular agricultural pilot province, 10 circular agricultural demonstration cities, 283 national modern agricultural demonstration zones, 1,100 beautiful countryside and several eco-agricultural demonstration bases. In key river basins and important water source protection areas, we will implement the construction of demonstration zones for the comprehensive prevention and control of livestock and poultry breeding wastes and agricultural nitrogen and phosphorus pollution, and actively explore effective mechanisms for the prevention and control of agricultural non-point source pollution in river basins.

　　To sum up, in recent years, the positive results of agricultural ecological environment protection and governance, as well as the continuous improvement of agricultural production and income and rural development, have made us more qualified, capable and confident to fight the tough battle of agricultural non-point source pollution prevention and control.

　　Three, to "one control, two reduction and three basics" as the key task, to fight the battle against agricultural non-point source pollution.

　　Since the 18th National Congress of the Communist Party of China, General Secretary of the Supreme Leader and other central leading comrades have repeatedly made important instructions on the protection and governance of agricultural ecological environment. General Secretary of the Supreme Leader pointed out that agricultural development should not only put an end to the new debts owed by the ecological environment, but also gradually pay back the old debts, and fight a tough battle for agricultural non-point source pollution control. Premier Li Keqiang proposed that the deterioration of resources and environment should be resolutely suppressed and the overdrawn resources and environment should be rehabilitated. In order to implement a series of deployment requirements of the CPC Central Committee and the State Council, at the beginning of this year, the Ministry of Agriculture, together with relevant departments, successively issued the National Agricultural Sustainable Development Plan (2015-2030), the Agricultural Prominent Environmental Problems Control Plan (2015-2018) and the Implementation Opinions of the Ministry of Agriculture on Fighting the Fight against Agricultural Non-point Source Pollution. Recently, a national on-the-spot meeting on accelerating the transformation of agricultural development mode and a national conference on the protection and governance of agricultural ecological environment have been held in Sichuan, which is an important meeting with milestone significance in the development process of modern agriculture in China. The promulgation of these documents and the convening of the conference have fully deployed and mobilized the protection and governance of agricultural ecological environment. At present, the most important task is to focus on the goal of "one control, two reductions and three basics" and fight a tough battle against agricultural non-point source pollution.

　　First, vigorously develop water-saving agriculture.Facing the severe situation of increasingly scarce water resources, it is necessary to increase efforts to develop water-saving agriculture. By strengthening the demonstration of water-saving agriculture, actively promoting water-saving varieties, integration of water and fertilizer, circulating aquaculture and other technologies, the utilization efficiency of water resources will be improved in an all-round way. Actively promote the comprehensive reform of agricultural water price. Coordinate the promotion of water ecological protection and management in river basins, and actively carry out the construction of demonstration zones for comprehensive prevention and control of agricultural non-point source pollution in key river basins such as Taihu Lake, Erhai Lake, Chaohu Lake and Three Gorges Reservoir Area. By 2020, the national agricultural irrigation water consumption will be controlled within 372 billion cubic meters, and the effective utilization coefficient of farmland irrigation water will reach 0.55.

　　The second is to implement the zero growth action of chemical fertilizers.The key to reducing fertilizer application is to establish the concept of green yield increase, vigorously promote scientific fertilization, improve the accuracy and utilization rate of fertilizer use, and encourage farmers to use more green manure and farmyard manure. The key point is to expand the application scope of soil testing and formula fertilization, and promote the formula fertilizer to enter the village and enter the field. At the same time, it is necessary to actively promote the research and development and promotion of new fertilizer products, and integrate and promote high-efficiency fertilization technologies such as simultaneous sowing of seeds and fertilizers and deep application of fertilizers. It is necessary to combine the construction of high-standard farmland, vigorously carry out the action of protecting and improving the quality of cultivated land, study and use subsidies to encourage and guide farmers to promote straw returning, planting green manure, accumulating farmyard manure and increasing the application of organic manure, rationally adjust the fertilization structure, and strive to improve the internal quality of cultivated land. Strive to achieve more than 90% coverage of soil testing and formula fertilization technology, more than 40% utilization rate of chemical fertilizers, and zero growth in the use of chemical fertilizers for major crops in China by 2020.

　　The third is to implement the zero growth action of pesticides.Adhere to comprehensive management, treat both the symptoms and the root causes, and realize scientific and accurate drug application. Strengthen the management of pesticide use, strengthen source management, and standardize farmers’ use of pesticides. Fully implement the fixed-point management of highly toxic pesticides and establish a traceability system for highly toxic pesticides. We will implement pilot projects for the use of low-toxic and low-residue pesticides, gradually expand the scope of subsidy projects, and accelerate the popularization and application of biological pesticides and high-efficiency, low-toxic and low-residue pesticides. Encourage agricultural socialized service organizations to provide guidance and services for farmers to use pesticides, and vigorously promote the integration of specialized unified prevention and control and green prevention and control. Ensure that by 2020, the coverage rate of green prevention and control of major crop pests and diseases will reach more than 30%, the utilization rate of pesticides will reach more than 40%, and the use of pesticides for major crops in China will achieve zero growth.

　　The fourth is to promote the prevention and control of aquaculture pollution.Overall consideration of environmental carrying capacity and pollution prevention requirements of livestock and poultry breeding, scientific planning and layout of livestock and poultry breeding. Promote standardized scale farming, supporting the construction of treatment and utilization facilities, improve facility farming technology, improve technical and equipment conditions, and encourage and support the implementation of household collection and centralized treatment of livestock and poultry manure in densely populated areas. Strengthen the construction of demonstration farms for healthy aquaculture, and popularize aquaculture technologies such as industrialized circulating aquaculture, pond ecological circulating aquaculture and bottom sewage of large-surface cage aquaculture. By 2020, more than 75% of large-scale livestock and poultry farms (districts) will build supporting facilities for waste storage, treatment and utilization.

　　Fifth, efforts should be made to solve the residual film pollution in farmland.Accelerate the revision of mulching film standards, strictly stipulate the thickness and tensile strength of mulching film, prohibit the production and use of substandard mulching film, and ensure that the residual mulching film in farmland can be recycled from the source. Increase financial support for technical subsidies for dry farming. Carry out regional demonstration of farmland residual film recycling, support the construction of plastic film recycling outlets and waste plastic film processing capacity, gradually improve the recycling network, and innovate the plastic film recycling and reuse mechanism. Accelerate the research and development of eco-friendly degradable plastic film and plastic film residue picking and processing machinery, and establish and improve the evaluation system of degradable plastic film. Ensure that by 2020, the recovery rate of agricultural film will reach more than 80% in the current season.

　　Sixth, carry out in-depth utilization of straw resources.According to the idea of "policy support, demonstration and guidance, focusing on agriculture, industrial development and market operation", we will promote the full utilization of straw "five materials" according to local conditions. It is necessary to further support the demonstration of new technologies such as straw harvesting machinery returning to the field, green and yellow storage for feed, microbial decay and solidification carbonization gasification, and study and introduce policies and measures such as enjoying the price of agricultural electricity for straw primary processing, incorporating storage and storage land into agricultural land management and credit support. Accelerate the establishment of a market-oriented mechanism for straw storage and transportation, reduce the cost of storage and transportation, and promote the scale and industrialization of comprehensive utilization of straw. In the key areas of air pollution, start the construction of demonstration counties for comprehensive utilization of straw, and fundamentally solve the problem of open burning of straw. Achieve the goal that the comprehensive utilization rate of straw will reach over 85% by 2020.

　　Agricultural non-point source pollution control is a tough battle and a protracted war. We need to base ourselves on the present and focus on the long-term. We should focus on five "enhancements" and five "enhancements", strengthen top-level design, increase planning and implementation, strengthen legal promotion, increase supervision and law enforcement, strengthen financial security, increase social participation, strengthen monitoring and early warning, increase scientific and technological support, strengthen policy creation, increase supervision and assessment, and take multiple measures to ensure implementation.