Since ancient times, heroes have produced teenagers. In history, we have seen countless talented teenagers invent various theories, methods, technologies and products that change the world.

Today, teenagers with unlimited imagination and creativity are also changing the world with their own inventions.

Looking at their inventions, some can bring new impetus to the transformation of an industry, while others hope to save the lives of a group. But all roads lead to the same goal, and their inventions are put forward because they see the existence of a certain problem and want to change and solve it.

Of course, behind their inventions, we should pay more attention to what kind of education and environment can provide fertile ground for teenagers to give full play to their imagination and creativity. What should we do to naturally shape this kind of education and environment.

After all, young people are strong, and technology is strong; Youth is strong, then the country is strong.

1. Ionic liquids for industrial carbon capture.

CO2 is one of the most important greenhouse gases, but it is also a rich resource. At present, some organic solvents are commonly used in industrial production to absorb CO2, but it is difficult to release CO2 again, and it is easy to corrode industrial equipment.

In September, 2017, Zhao Songrui, who is already a freshman in the School of Chemistry and Molecular Engineering of Peking University, won the special prize of the European Association of Chemistry and Molecular Sciences for his "Study on the Synthesis and Characterization of Pyridine Ionic Liquids and CO2 Absorption Performance", which achieved a zero breakthrough for Chinese players in the EU Young Scientists Competition.

The pyridine ionic liquids studied by Zhao Songrui can quickly attract and release CO2, and the stability is very good. This technology has a broad application prospect in the field of industrial carbon capture.

2. Ultra-efficient catalyst converts plastic waste into biofuel.

AzzaAbdelHamidFaiad, an Egyptian girl, found a cheap catalyst at the age of 16, which can quickly and continuously convert plastic waste into biofuel.

Faiad successfully decomposed waste plastics into methane, propane and ethane by using calcium-based bentonite as catalyst, and then converted it into ethanol for fuel use.

The process can produce as much as 138,000 tons of hydrocarbon gas every year, and generate biofuels worth 78 million dollars. Egypt produces about 1 million tons of waste plastics every year, which is helpful to Egypt’s environmental protection and economic development.

She won the prize of European Nuclear Fusion Development Agreement (EFDA) in the 23rd European Union Young Scientists Competition, and attracted the attention of Egyptian Petroleum Research Institute.

3. Life-saving building fire smoke mask system

In 2013, AlexisLewis, an American girl, heard a mother throw a 2-year-old child from the second floor to avoid the harm caused by fire smoke to the child, which led to the idea of designing a smoke mask.

In order to save the people trapped in the building by the fire, Lewis found in the experiment that the success rate of directly throwing the smoke mask into the room from the window was very low, so he designed several 3D printed bomb prototypes and installed a light smoke mask produced by XcaperIndustries, a professional respiratory protection equipment manufacturer, in the bomb.

After more than 290 tests by 37 firefighters throwing bullets at the second floor window, the rugby-type bullets with throwing accuracy exceeding 70% were finally determined.

The design can provide a safe breathing mask for those who encounter fire and have no time to escape, which effectively protects the lives of residents.

Lewis was only 15 years old when he designed the smoke mask system, and he had many patent inventions.

4. Using algae to convert CO2 from automobile exhaust into oxygen.

In 2008, ParamJaggi, a 16-year-old American boy, began to pay attention to automobile exhaust emissions while learning to drive. He designed an exhaust purifier using seaweed, which can reduce carbon dioxide in automobile exhaust.

With this invention, he won a prize of 8,000 dollars and a sustainable development award from the US Environmental Protection Agency.

ParamJaggi has applied for a patent and set up a company. The first product developed by Paramjaggi, AlgaeMobile carbon filtration system, has built-in panels covered with special algae strains on both sides, and uses photosynthesis to absorb carbon dioxide emitted by automobiles to produce oxygen and glucose (for feeding algae).

Considering that automobile exhaust emissions are too fast, Jaggi arranges a plurality of panels in a staggered way to increase the contact surface area of carbon dioxide and melt carbon dioxide into water to form carbonic acid; Sodium hydroxide placed in the filter reacts with carbonic acid to form harmless carbonate.

ParamJaggi has won many honors and been included in Forbes’ list of 30 outstanding men under the age of 30 in American science and technology field.

5. Simple life-saving equipment in the car to prevent children from dying of heat.

Every year, many children around the world die of heat in cars for various reasons. In 2011, AndrewPelham, an 11-year-old American boy, came up with the concept of EZBabySaver when he heard that a 10-month-old baby was trapped in a car and died of heat.

Pelham’s invention is made of rubber sleeve and adhesive tape, which connects the handle in the front door of the car with the driver’s back seat, thus reminding parents to check the back seat before getting off the bus to prevent tragedy. With this invention, he won the runner-up in the Young Inventors Group in the Rubber Band Competition.

According to media reports, hundreds of parents and grandparents around the world told Pelham by email that they had made this simple baby protector. Although the attention of this small invention is limited, we have to admit that it is a very effective invention.

6. Low-cost Lego Braille printers

In 1824, Louis Blair, a 15-year-old French blind man, created French Braille to help countless blind people read.

In 2014, 13-year-old American boy ShubhamBanerjee used robot toys and programming technology to help the blind again.

Banerjee assembled a Braille printer Braigo using Lego EV3 set with a price of $350. The printer can print Braille with better recognition ability by updating the built-in software and enhancing the hardware.

The invention directly reduces the price of Braille printers on the market from 2000 dollars to 350 dollars. Banerjee has set up a laboratory, focusing on the research of low-cost Braille printing technology, and obtained the investment from Intel. The lab also developed "the world’s first low-cost/silent/on-chip translation /IOT-Cloud printer concept".

This invention helped Banerjee win the 2014 Technology Award and was invited to attend the WhiteHouseMakerFaire (Creative DIY Party) held in the White House.

7. Cheap and rapid Ebola detection

In 2015, OliviaHallisey, a 16-year-old American middle school student, invented a new Ebola virus detection technology.

The invention is based on the principle of chemical reaction. When Ebola virus in blood reacts with chemicals in the reagent, the reagent will change color. This method can complete the detection within 30 minutes.

In addition, the cost of each detection is only 25 dollars, and the storage and transportation of reagents do not need refrigeration.

This invention helped Hallisey win a $50,000 scholarship in the 2015 Google Science Challenge.

(Source: Capital Lab, Li Xin. The content only represents the author’s personal views, not the position of the forum)

Asian Wave, Boao Vision

"Be based in Asia and face the world"

Pass on the latest trends of the forum and promote in-depth cooperation in Asia.

Communicator of important global dialogues and watcher of common development in Asia.

"525" is the homonym of "I love me", reminding everyone to "cherish life and care for themselves". To this end, from May 25th to June 25th, various departments of our city jointly launched the theme activity of "Sunshine Escort, Enjoy the Soul". Through a series of publicity and the promotion of the 96525 psychological assistance hotline, we called on everyone to be kind to themselves and care for themselves, so as to further enhance the public’s psychological quality and promote the harmonious development of physical and mental health.

From more than 100 calls a year to thousands.

Increase in demand

It is understood that in 2020, the Provincial Health and Wellness Committee applied to the provincial communication management department for a short number of 96525, and in that year, it was determined to be the psychological assistance hotline of Zhejiang Province. Wenzhou City opened this hotline for the first time, and the hotline answering work relied on the professional strength of the Seventh People’s Hospital of the city.

In fact, the Seventh People’s Hospital of the city has a long history of psychological assistance hotline work and has rich experience. As early as 2005, the hospital opened the first psychological assistance hotline 0577-88434567, and also opened the QQ online psychological assistance group. At that time, the service team was already very professional, consisting of psychiatrists and psychological counselors. However, there are not many consultation calls, only one or two every day.

Later, with the increasing demand for public psychological services, coupled with the integration of the 12355 youth psychological special line set up by Wenzhou Communist Youth League Committee, the number of psychological assistance hotlines increased significantly. The hospital also made full use of the social platform and added the WeChat psychological assistance "Wen Qi Yi Talk Channel", which was well received.

In 2017, in order to standardize all kinds of psychological assistance hotlines in our city, the hospital integrated some free psychological assistance hotlines in our city into 12320, and concentrated professional talents to provide professional and high-quality psychological assistance services for the people in the city.

"The number of psychological assistance hotlines has increased from more than 100 per year to thousands today." Huang Guoyong, secretary of the Party Committee of the Seventh People’s Hospital, said that since the opening of the city’s unified psychological assistance hotline 96525 in 2020, up to now, a total of 14,538 psychological counseling calls have been received. Since the beginning of this year, a total of 1629 calls for psychological counseling have been received. Judging from the problem of telephone consultation, the emotional problem of minors under the age of 18 ranks first, accounting for 25%; Followed by emotional problems of adults, accounting for 11%. In the process of consultation, the problems of 15 callers with high-risk situations such as depression and suicidal ideation were successfully solved.

"In recent years, the number of telephone consultations has increased, reflecting the public’s greater demand for professional psychological counseling." Huang Guoyong said that these psychological problems mostly come from work, family, school and so on. Due to the great pressure of life and work, modern people will have some minor psychological problems more or less. If they can get benign guidance, they will easily return to normal.

From student problems to various crisis events.

Expand the scope of consultation

May 25th is "National Mental Health Day for College and Middle School Students". From this perspective, the original 96525 was more of a "special line" for students. However, in the past two years, with the increase of public awareness of 96525, the caller group has already expanded from students to all ages and occupations, and the consultation questions are also varied, and there are even high-risk situations.

Recently, a young mother called to tell her anxiety. It turned out that her child had otitis media, and the elders at home took the child to the hospital to see a doctor. She is worried that they will be infected with other diseases during the treatment, and then infect themselves, so they are in anxiety every day and even affect their sleep. She will continue to wash her hands and take her temperature. But in fact, her family has been in the hospital for more than half a month, and there are no symptoms of discomfort. At this time, she feels that there is something wrong with her excessive worry and she almost collapses. After the normalization and positive explanation of the counselor, the counselor relaxed a lot, and she accepted her state more.

Huang Guoyong said that 96525 received calls from graduate students asking how to deal with the relationship with their tutors, parents asking how to educate adolescent children about sex, middle and high school students seeking ways to relieve anxiety before exams, and middle-aged men trying to relieve the pressure brought by family and work. "The psychological assistance hotline has a clear functional orientation, which is the first-level prevention of the crisis. Of course, everyone has a different understanding of the crisis. As long as you feel that something has an impact on you and it will get worse if you don’t solve it, then this is a crisis. At this time, you can call the psychological assistance hotline. " He said that even some people who have not encountered practical problems but just want some advice and suggestions can seek help from the hotline service. In a word, the function of the psychological assistance hotline is to help counselors to relieve emotional stress, learn to face reality and restore their sense of control over life.

From tinkering around the edges to becoming stronger and bigger.

Building a high-quality "lifeline"

The 96525 psychological assistance hotline is online 24 hours a day, providing free consultation and counseling services around the clock.

"Offline clinics are’ visible and tangible’, which can be comprehensively judged and evaluated by the patient’s face-to-face, speech, body posture and other aspects; On the online, you can only communicate through voice. This requires psychological counselors and psychotherapists who answer calls, and can use professional knowledge to quickly judge and solve problems. The team behind this phone line is quite strong. " Huang Guoyong compared the 96525 psychological assistance hotline to a "mental emergency room". Once it encounters a high-risk situation, it is a "lifeline".

Huang Guoyong said that next, we will continue to strengthen team building and train professional talents. Constantly improve the professionalism, professional ability and service awareness of the operator team, and help the consultants to stabilize their emotions, find out the reasons, provide psychological support and guidance, and find themselves through reflective listening. Establish a dynamic updating mechanism of knowledge base information, and equip professionals to improve service quality and professional quality, and realize the "quantity and quality" Shuang Sheng for mental health talents.

Pan Jianfen, deputy director of the Department of Disease Prevention and Control and Occupational Health of the Municipal Health and Health Commission, said that since the beginning of this year, the city has accelerated the integration of various psychological service hotlines, and achieved "mental health number one" through withdrawal and merger. For example, the youth rights hotline 12355, the women’s Federation rights hotline and the family education hotline all realize two-way transfer with 96525, and the 12345 and 96525 run in parallel, and the special psychological service is accepted by 96525. Citizens can get free professional mental health consultation service anytime and anywhere by dialing 96525.

Pan Jianfen said that next, the city’s psychological assistance hotline management center will be upgraded by relying on the 96525 hotline, and feedback information from psychological assistance hotlines, official portals, WeChat WeChat official account, offline self-service terminals, offline venues and other mental health service portals will be gathered, and 110 public security alarm systems and 120 medical emergency systems will be embedded to realize 24-hour free and efficient psychological emergency assistance. Make the 96525 hotline a "heart-to-heart bridge" to communicate social psychology, a "happy lock" to promote mental health, and a "hard brand" to show first-class service.

"Of course, while promoting the psychological assistance hotline, the hospital will also actively carry out diversified popular science propaganda and comprehensively carry out mental health promotion and education, such as spreading mental health knowledge through psychological lectures into the campus and community clinics, advocating a healthy lifestyle, improving mental health literacy, and cultivating a good social mentality, so that everyone can become the’ first person responsible for their mental health’." Huang Guoyong said.(Reporter Hu Ning)

With the increasing pursuit of "face value", the medical beauty service market is developing rapidly. In addition to the traditional double eyelid surgery (double eyelid plasty), more and more consumers choose to inject sodium hyaluronate (hyaluronic acid), collagen and botulinum toxin, or perform "micro-plastic surgery" such as rhinoplasty, chin augmentation, face-lifting, line carving and risorius injection.

However, many "beauty-seeking" consumers are not very clear about what medical beauty is and what items belong to it, so that they blindly believe in individuals who are not doctors and life beauty institutions that illegally carry out medical beauty, resulting in their own legitimate rights and interests being infringed.

First of all, let’s recognize the difference between medical beauty and life beauty.

Medical beauty: the use of surgery, drugs, medical equipment and other traumatic or invasive medical techniques to repair and reshape the appearance and morphology of various parts of the human body.

Beauty of life: the act of providing consumers with non-invasive and non-invasive skin cleaning, skin care and cosmetic services by using techniques, equipment and products such as makeup and skin care.

Unqualified, cheating customers

Without obtaining the Practice License of Medical Institution, the employees have not obtained the Practice Certificate of Physician and the Practice Certificate of Nurse of relevant majors, and have not been trained and qualified by Medical facial make-up.

Most of the illegal medical beauty salons are unqualified life beauty salons or personnel who use invasive methods to carry out freckle removal, wrinkle removal, breast enhancement, weight loss, etc., and their behavior belongs to illegal medical practice. Due to the lack of relevant qualifications and technical and sanitary conditions for medical beauty, it is easy to cause physical damage to consumers.

Exceeding the scope of practice, illegal operation

Although some medical beauty institutions have obtained the Practice License of Medical Institutions, they carry out medical services outside the approved subjects or medical beauty projects outside the record.

According to the technical difficulties and possible medical risks of medical cosmetic projects, the national health administrative department has formulated the Catalogue of Classified Management of Medical Cosmetic Projects, which classifies and manages medical cosmetic projects. Different types and levels of medical cosmetic surgery can only be carried out in medical institutions with corresponding qualifications.

Do not sign the contract, do not tell.

Some medical and beauty institutions do not actively inform customers of indications, contraindications, medical risks and precautions before surgery, do not obtain the signature consent of the patient or guardian, do not sign a medical and beauty surgery contract, or do not specify their respective rights and obligations involved in the contract. When the surgery fails, it is difficult for consumers to defend their rights.

Measures for the administration of medical beauty services

(Order No.19 of the Ministry of Health was issued on January 22, 2002. The first revision was based on the Notice of the Ministry of Health on Amending Article 2 of the Measures for the Administration of Medical Beauty Services on February 13, 2009 (Wei Yi Zheng Fa [2009] No.17). The second revision was based on the Decision of the National Health and Family Planning Commission on Amending the Interim Measures for the Administration of Foreign Doctors’ Short-term Practice in China on January 19, 2016.

Chapter I General Provisions

Article 1 These Measures are formulated in accordance with the Law on Medical Practitioners, the Regulations on the Administration of Medical Institutions and the Measures for the Administration of Nurses in order to standardize medical beauty services, promote the healthy development of medical beauty undertakings and safeguard the legitimate rights and interests of medical patients.

Article 2 The term "medical cosmetology" as mentioned in these Measures refers to the repair and reshaping of human appearance and the morphology of various parts of the human body by surgery, drugs, medical instruments and other traumatic or invasive medical techniques.

The term "beauty medical institutions" as mentioned in these Measures refers to medical institutions mainly engaged in medical beauty diagnosis and treatment.

The term "attending physician" as mentioned in these Measures refers to a practicing physician who meets the conditions as stipulated in Article 11 of these Measures and is responsible for the implementation of medical beauty projects.

The medical cosmetology department is a first-class diagnosis and treatment subject, while cosmetic surgery, cosmetic dentistry, cosmetic dermatology and cosmetic Chinese medicine are second-class diagnosis and treatment subjects.

According to the technical difficulty of medical beauty projects and the degree of possible medical risks, graded access management is implemented for medical beauty projects. The Catalogue of Classified Management of Medical Beauty Projects shall be formulated separately by the Ministry of Health.

Article 3 All institutions and individuals that provide medical beauty services must abide by these Measures.

Article 4 The Ministry of Health (including state administration of traditional chinese medicine) is in charge of the management of medical beauty services throughout the country. The administrative department of health of the local people’s governments at or above the county level (including the administrative department of traditional Chinese medicine, the same below) is responsible for the supervision and management of medical beauty services within their respective administrative areas.

Chapter II Establishment and Registration of Institutions

Article 5 An application for holding a beauty medical institution or setting up a medical beauty department by a medical institution must meet the following conditions:

(1) Having the ability to bear civil liabilities;

(two) there is a clear scope of medical beauty diagnosis and treatment services;

(3) Conforming to the Basic Standards for Medical Institutions (for Trial Implementation);

(4) Other conditions stipulated by the health administrative department of the people’s government at or above the provincial level.

Article 6 Units or individuals applying for setting up beauty medical institutions shall go through the formalities of examination, approval and registration in accordance with these Measures and the Regulations on the Administration of Medical Institutions and the Detailed Rules for the Implementation of the Regulations on the Administration of Medical Institutions.

The administrative department of health shall make a decision of approval or disapproval within 30 days from the date of receiving the qualified application materials, and give a written reply to the applicant.

Article 7 The administrative department of health shall, at the same time as issuing the Approval Letter for Setting up a Medical Institution and the Practice License for a Medical Institution, file with the administrative department of health at the next higher level.

The examination and approval decision made by the health administrative department at a higher level against the violation by the health administrative department at a lower level shall be corrected or revoked within 30 days from the date of discovery.

Eighth beauty medical institutions must be registered by the administrative department of health and obtain the "Practice License for Medical Institutions" before they can carry out their practice activities.

Ninth medical institutions to add medical beauty subjects, must meet the conditions stipulated in these measures, in accordance with the "Regulations on the Administration of Medical Institutions" and its detailed rules for the implementation of the procedures, to the registration authority to apply for change of registration.

Tenth beauty medical institutions and medical beauty departments to carry out medical beauty projects shall be approved by the professional society designated by the registration authority, and shall be filed with the registration authority.

Chapter III Qualification of Practitioners

Article 11 The attending physician responsible for implementing the medical beauty project must meet the following conditions:

(1) Having the qualification of a medical practitioner and being registered by the medical practitioner registration authority;

(2) Having working experience in relevant clinical disciplines. Among them, those who are responsible for the implementation of cosmetic surgery projects should have more than 6 years of clinical work experience in cosmetic surgery or plastic surgery and other related majors; Responsible for the implementation of cosmetic dentistry projects should have more than 5 years of clinical work experience in cosmetic dentistry or stomatology; Responsible for the implementation of cosmetic Chinese medicine and cosmetic dermatology projects should have more than 3 years of clinical work experience in Chinese medicine and dermatology respectively;

(3) Having been trained or advanced in medical facial make-up and qualified, or having been engaged in clinical work of medical cosmetology for more than 1 year;

(4) Other conditions stipulated by the health administrative department of the provincial people’s government.

Article 12 A medical practitioner who does not meet the requirements of the attending physician as stipulated in Article 11 of these Measures may engage in the clinical technical service of medical beauty under the guidance of the attending physician.

Thirteenth personnel engaged in medical beauty care, should also meet the following conditions:

(1) Having the qualification of a nurse and being registered by the nurse registration authority;

(two) with more than 2 years of nursing experience;

(3) Having passed the professional training or advanced study of medical beauty care, or having been engaged in clinical nursing of medical beauty for more than 6 months.

Fourteenth personnel who have not been approved by the administrative department of health and gone through the registration formalities shall not engage in medical beauty diagnosis and treatment services.

Chapter IV Practice Rules

Fifteenth the implementation of medical beauty projects must be carried out in the corresponding beauty medical institutions or medical institutions with medical beauty departments.

Sixteenth beauty medical institutions and medical beauty departments should carry out medical services within the scope of diagnosis and treatment subjects approved by the health administrative department according to their own conditions and capabilities, and may not expand the scope of diagnosis and treatment without approval.

Beauty medical institutions and medical institutions that set up medical beauty departments shall not carry out medical beauty projects that have not been filed with the registration authority.

Seventeenth practitioners of beauty medical institutions should strictly implement the relevant laws, regulations and rules, and abide by the operating rules of medical beauty technology.

Medical materials used by beauty medical institutions must be approved by the relevant departments.

Eighteenth medical beauty services to implement the doctor responsibility system. Medical beauty projects must be implemented by the attending physician or under his guidance.

Nineteenth medical practitioners must inform the medical treatment indications, contraindications, medical risks and precautions in writing to the medical treatment patients or their relatives before treatment, and obtain the signature consent of the medical treatment patients or their guardians. Without the consent of the guardian, medical beauty projects shall not be implemented for people with no or limited capacity for behavior.

Article 20 Practitioners of beauty medical institutions and medical beauty departments should respect the privacy right of medical patients, and may not disclose the patient’s illness and medical records to a third party without the consent of the patient himself or his guardian.

Twenty-first beauty medical institutions and medical beauty departments have serious medical negligence, and should report to the health administrative department of the local people’s government in a timely manner according to the regulations.

Twenty-second beauty medical institutions and medical beauty departments should strengthen the management of medical quality and continuously improve the service level.

Chapter V Supervision and Administration

Twenty-third any unit or individual, without obtaining the "practice license of medical institutions" and approved by the registration authority to carry out medical beauty diagnosis and treatment subjects, shall not carry out medical beauty services.

Twenty-fourth health administrative departments of local people’s governments at all levels should strengthen the audit of medical beauty projects for the record. If it is found that beauty medical institutions and medical institutions offering medical beauty departments do not have the conditions and ability to carry out a medical beauty project, they should promptly notify the institutions to stop carrying out the medical beauty project.

Twenty-fifth relevant professional associations and industry associations should actively assist the administrative department of health to standardize the behavior of medical beauty services and strengthen industry self-discipline.

Twenty-sixth beauty medical institutions and medical beauty departments medical disputes or medical accidents, in accordance with the relevant provisions of the state.

Twenty-seventh release of medical beauty advertisements must be handled in accordance with the provisions of national laws and regulations on advertising management.

Twenty-eighth in violation of the provisions of these measures, according to the relevant provisions of the "Medical Practitioners Law", "Regulations on the Administration of Medical Institutions" and "Measures for the Administration of Nurses" will be punished.

Chapter VI Supplementary Provisions

Twenty-ninth surgery, stomatology, ophthalmology, dermatology, Chinese medicine and other related clinical disciplines involved in the process of disease treatment related medical beauty activities are not subject to these measures.

Article 30 The health administrative department of the people’s government at or above the county level shall, within one year after the implementation of these measures, examine and re-issue the Practice License for Medical Institutions according to the provisions of these measures.

Article 31 These Measures shall come into force as of May 1, 2002.

Source: Health Yuncheng Guanwei

Original title: "Protection of Consumer Rights and Interests | Beware of Illegal Medical Beauty"

Read the original text

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)

Recently, Fred Lambert, a reporter from foreign media electrek, released a video that was tested in the Blue Ridge Mountains in North Carolina. The video shows that during the test, this version of the FSD existed many times, that is, the vehicle suddenly slowed down without necessity, and even almost drove the car to a cliff.

Fred was always ready to take over during the test. In this test, Fred only took over once, that is, the time when Tesla FSD Beta V10.12 drove the car to the cliff.

On the whole, during the 13-minute test, the overall performance of Tesla FSD beta version V10.12 is ok, but many times of "ghost braking" and wrong judgment are still frightening, and problems such as "ghost braking" still need to be solved.

Fred said that the reason why he chose to test in the Blue Ridge Mountains is that there are few intersections here and the road traffic markings are clear. He believes that in this environment, Tesla’s FSD will perform well.

This is also the case. In most cases in the test, the computer vision inspection system of FSD Beta V10.12 runs well, and Fred’s Model 3 always stays in the center of the lane.

▲ the path of FSD planning

In the middle of the test, Fred met hikers, who were close to the road and the road was not covered by shoulders. Tesla FSD Beta V10.12 version, then controlled the vehicle to slow down, and even planned to drive a little to the left to make way for the hikers.

However, in addition to these advantages, Tesla FSD Beta V10.12 has some serious shortcomings.

Fred said that the most annoying thing about FSD Beta V10.12 is that the vehicle suddenly slows down without sufficient reason.

The video shows that "ghost braking" happened several times during driving. Although Fred feels that the sudden deceleration is not so obvious when the "ghost brake" occurs, it may only be because the speed of this test is a little slow.

In addition, Fred also noticed that the speed of Tesla FSD Beta V10.12 in controlling the turning of vehicles is also somewhat inconsistent. As you can see in the video, Tesla’s FSD controls the vehicle to slow down at some corners that don’t seem to need to slow down.

▲ FSD controls the vehicle to turn.

In addition, in the 8-mile (about 12.8 km) and 13-minute test, Fred only took over the driver once, but this time it was taken over in a very dangerous situation.

In the 12th minute and 56th second of the test, Tesla FSD Beta V10.12 controls the vehicle to turn sharply too fast. When Fred found that the car was crossing two lanes and heading for the other side of the road, he immediately stepped on the brakes. It was a very scary moment.

▲ Tesla FSD turned sharply and almost threw the owner off the cliff.

Strangely, the FSD beta version V 10.12 should know that there is a sharp turn in this road and it is necessary to slow down the vehicle. Because its speed is 10 mph (16 km/h) slower than the set speed, but somehow it didn’t correctly predict that turn.

In addition, it can be seen from the predicted path (blue line) displayed on the screen inside the car.

According to Fred’s test video, there are still many problems in Tesla’s FSD Beta V10.12 version. Although this version has greatly improved the recognition of some straight roads and vehicles, the problems of "ghost braking" and automatic turning still need to be solved.

This test also reminds Tesla owners that if they use this version of the test software, they still need to be highly vigilant and ready to take over at any time to ensure driving safety.

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)

The military parade is an extremely grand military ceremony.

It embodies the national prestige of a country, the military prestige of an army and the integrity of a nation.

It is an important form for soldiers to swear loyalty to the country and show their military style.

It is of great significance for promoting national prestige and military prestige, inspiring national spirit and inspiring patriotic enthusiasm.

Since the founding of New China, there have been 14 National Day military parades and the Victory Day of the Anti-Japanese War in 2015, and military parades have also been held in some large-scale military exercises.

There are many perspectives on how to look at these military parades.

You can see it from the reading formation

You can see from the weapons and equipment

From the clothing of the troops being read

You can see from the slogan of the military parade.

You can also look at it from the leader’s review car and so on

In short, the National Day military parade has a lot to watch.

From these perspectives, we can see that the achievements of national defense modernization and the revolutionary, modernized and regularized new features of the People’s Liberation Army reflect the comprehensive quality and economic strength of the country, as well as the military and cultural level of the country and the army.

"CNR National Defense Time and Space" specially invited Jiang Tingyu, former director and researcher of the Editorial Research Department of China People’s Revolutionary Military Museum, to tell you about it.

Viewing the military parade from multiple perspectives

first episode

Viewing the military parade from the formation of the troops being read

The pictures in this article are all from "CNR National Defense Time and Space" WeChat WeChat official account.

The formation of military parade is an important content and element of military parade. The formations read can reflect the development process of the People’s Liberation Army (PLA) from a single army to a synthetic army of various military types, the reform and changes of the PLA establishment system, and the achievements of the national defense and army building in new China and the brand-new features of the PLA’s revolutionary, modern and regular construction.

Founding ceremony military parade

Navy, air force

First formation. See Synonyms at first formation

The troops being read are mainly the army.

In the founding ceremony military parade in 1949, 16,400 troops were read, which were formed in the sequence of the navy, army and air force. Although the navy had only two platoons, it was organized as a square team and walked in the front. The army is formed in the order of infantry division, artillery division, chariot division and cavalry division. Seventeen aircraft of the Air Force are organized into a mixed flight echelon and six detachments. The troops under study are nominally the army, navy and air force, but in fact they are mainly the army, and the army is mainly the infantry. The navy, air force and other arms are still being formed.

Navy parade in founding ceremony.

Cavalry team in founding ceremony military parade

Military parade on the first anniversary of National Day

The number of reference troops is the largest, and the formation under review has reflected the gradual progress from a single army to a synthetic army of various services and arms.

In 1950, 24,209 officers and men participated in the National Day military parade, which was the largest number of troops in the 13th National Day military parade in New China. During the National Day military parade, the leading bodies of the air force, navy, artillery, armored forces and other services and arms have been established, and the objects and formations read have reflected that the People’s Liberation Army has gradually moved from a single army to a synthetic army of various services and arms.

The air force parade in the National Day military parade in 1950.

1950年国庆阅兵接受检阅的坦克方队

国庆两周年阅兵

军事院校、伞兵部队、探照灯部队和民兵编队首次参加受阅。

1951年国庆阅兵，受阅的陆海空三军部队和民兵代表13348人。地面方队13个，空中梯队3个，共16个编队。这次阅兵，首次出现了军事院校方队，并且作为受阅第一方队，反映了我军注重院校建设，重视培养军队现代军事人才 。伞兵部队、探照灯部队也是首次编队受阅。民兵作为一个方队首次参加国庆阅兵。

1951年国庆阅兵中军事学院方队

首次受阅的伞兵部队

国庆三周年阅兵

公安部队首次编队受阅

1952年国庆阅兵，陆海空三军部队和民兵代表11300多人接受检阅。公安部队第一次编队受阅。1950年11月公安部队领导机构成立，公安部队成为人民解放军的一个重要军种。

1952年国庆阅兵中民兵方队

国庆四周年阅兵

The first formation of "Katyusha" rocket artillery was read

1953国庆阅兵，陆海空军代表11035人参加受阅，48个地面方队和6个空中梯队。“喀秋莎”火箭炮兵首次编队受阅，成为阅兵的一个亮点。在炮兵方队里，拖拉机牵引着巨大的加榴炮通过天安门广场。“拖拉机拖炮”成为国庆四周年阅兵的一道风景线。

The first formation of "Katyusha" rocket artillery was read

Military parade on the fifth anniversary of National Day

The cavalry team was read for the last time

In the National Day military parade in 1954, there were 10,384 people in 38 teams on the ground and 4 flight echelons in the air. Among them, there are 7 military academies, and the cavalry has been organized into 6 teams. This is the last time the cavalry troops were reviewed in the National Day military parade. Since then, the cavalry troops have withdrawn from the National Day military parade stage.

The cavalry team that was read for the last time

Military parade on the sixth anniversary of National Day

The People’s Liberation Army implements the military rank system.

For the first time, a general leader appeared in the troops under study.

In the National Day military parade in 1955, 10,344 troops were read by the armed forces, forming 27 square teams and several flight echelons. After the People’s Liberation Army implemented the military rank system, all the officers and men of each party team of the army, navy and air force were wearing new military uniforms, wearing ranks and badges, and they were full of energy and spirits, showing the new look of the People’s Liberation Army after the military rank system was implemented. This military parade, in the military academy team, there was also a general leader.

The military academy team led by the general

Military parade on the seventh anniversary of National Day

Due to the rain, the airborne echelon was not read.

In the National Day military parade in 1956, 11,929 troops were referred to and organized into 29 ground teams and several flight echelons for reference. See the officers and men of the army taking the domestic Jiefang brand car for review. The airborne echelon was not read because of the rain.

People’s Liberation Army reading in the rain

National Day Eighth Anniversary Parade

It is the one with the least number of readers.

The first formation of domestic fighters was read.

In the National Day military parade in 1957, there were 29 parade teams and 5 aerial echelons, with 7064 participants, which was the least among the 13 military parades in New China. During the National Day military parade in 1957, China’s self-produced Il-28 jet bomber and J -5 fighter participated in the aerial echelon for the first time.

China’s self-produced bombers and fighters participated in the aerial echelon for the first time.

National Day Ninth Anniversary Parade

Seven militia divisions in the capital were read.

The first formation of female militia. See Synonyms at first.

In the National Day military parade in 1958, there were 7,856 soldiers and militiamen, and 15 trekking teams, 14 vehicle teams and 6 aerial echelons were reviewed. "Capital Militia Division" appeared in the reading team for the first time, with seven capital militia divisions as references, and female militiamen were read in formation for the first time.

North China militia team read

The female militia team being read

National Day 10th Anniversary Parade

Refer to the large number of planes and the large number of air echelons.

In the National Day military parade in 1959, there were 11,018 troops in 35 formations, including 15 trekking teams, 14 vehicle teams, 6 aerial echelons and 155 planes. Compared with previous military parades, the number of planes and air echelons is the largest. The military parade was large in scale, but it only took 58 minutes, indicating that the organization of the military parade is becoming more and more thorough and mature.

The air echelon being read

Military parade on the 35th anniversary of National Day

The strategic missile team, the armed police team and the female soldier team participated in the reading for the first time.

In the National Day military parade in 1984, 10,370 troops were read, including 46 square (ladder) teams. There are 42 ground parades, including 24 mechanized parades and 18 trekking parades. There are more mechanized parades than before, which reflects the development and promotion of our army’s modernization. There are 4 air echelons and 94 aircraft. The strategic missile made its debut, and the female soldier team participated in the National Day reading for the first time, which became a beautiful landscape on the parade ground. The armed police force, which has just been formed, is also being read for the first time.

The female soldier team participated in the National Day reading for the first time.

The first appearance of the strategic missile team

50 th anniversary military parade

Army aviation, naval aviation, marine corps, armed police special police team and reserve forces were read for the first time.

In the National Day military parade in 1999, more than 11,000 people from the PLA Army, Navy, Air Force, Second Artillery Corps, People’s Armed Police Force, militia and reserve forces formed 42 ground teams and 10 air echelons, and 52 formations were reviewed. Among the ground teams, there are 17 trekking teams and 25 vehicle teams. Army aviation, naval aviation, marine corps, armed police special police and reserve forces were read for the first time. Air tanker, etc. See for the first time. There are 25 people in the parade, which is the highest in the world.

The marine corps team that was read.

The airborne troops team being read.

The 60th anniversary military parade.

Special forces, weapons and equipment and high-tech teams have been added. Special forces team, armed police armored vehicle team, airborne combat vehicle team, mobile radar team, signal equipment team, drone team, cruise missile team, early warning aircraft echelon, etc. refer to it for the first time. The echelon of female pilots first appeared in the National Day parade.

In the National Day military parade in 2009, there were more than 8,000 troops and militia reserves, including 56 square (ladder) teams, including 14 on foot, 30 on equipment and 12 in the air, which was the largest number of Chinese (ladder) teams in all previous National Day military parades in New China.

The Army has seven arms for reference, the Navy has four arms for reference, the Air Force has four arms for reference, and the Second Artillery Corps has six teams for reference. The first appearance of the special forces team, the second artillery walking team, and the female soldiers team of the three armed forces showed that the military parade was more comprehensive. The complete reference elements reflect the integrity of China’s armed forces system.

This National Day military parade has reduced the number of trekking teams and increased the number of equipment teams. There is only one infantry team. The navy, air force, second artillery and other arms and services have increased. The number of strategic missile teams of the Second Artillery Corps increased to five, and the number of aviation echelons increased to 12. For the first time, we refer to the UAV team, the airborne combat vehicle team, the signal equipment team, the logistics equipment team, the mobile radar team, the armed police armored vehicle team, the cruise missile team, and the early warning aircraft echelon. There are many arms and services of equipment and technology in the team being read, which reflects the transformation of the People’s Liberation Army from quantitative scale to quality and efficiency, and from manpower-intensive to technology-intensive.

The special forces team being read

The drone team being read

Anti-Japanese War Victory Day Parade

A team of anti-Japanese veterans appeared, and representatives of the anti-Japanese model troops formed a team to be read separately. Nearly 1,000 officers and men from 17 foreign military teams and teams attended the reading, which was the first time that China invited foreign military representatives to participate in the military parade.

Anti-Japanese War Victory Day military parade. 12,000 troops participated in the reading, and they were organized into 50 square (ladder) teams. Among them, there are 11 trekking teams, 2 anti-Japanese veteran comrades riding teams, 27 equipment teams and 10 aerial echelons. Representatives of the British model troops in the Anti-Japanese War formed a team to be read separately. Nearly a thousand officers and men from 17 foreign military teams and teams participated in the reading.

The Anti-Japanese War Veterans’ Team is a special reading team. Their average age is 90 years old, the youngest is 84 years old, and the oldest is 102 years old. Many of them are covered with medals, medals and commemorative medals on their chests, which record and show their achievements and historical contributions in the Anti-Japanese War.

Participate in the anti-Japanese war veteran team that was read.

It is the first time in the history of the new China military parade that representatives of the British model troops formed a team to be read separately. This fully reflects the full affirmation of the Party and the country to the British model troops who have made meritorious deeds and contributions in War of Resistance against Japanese Aggression.

Participate in the team of Yingmo troops in Langyashan.

Nearly 1,000 officers and men from 17 foreign military teams and teams from five continents in Asia, Europe, Africa, Oceania and America participated in the reading. This is the first time that China has invited foreign military representatives to participate in the military parade, which embodies a clear attitude of jointly commemorating the victory of the world anti-fascist war, embodies the internationality of the world anti-fascist war, and embodies the people of China and the people of other countries to jointly defend the victory of World War II and pursue and yearn for lasting peace in the world.

The Russian Federation armed forces team was reviewed.

For the first time, the 27 equipment teams that were read were grouped into six combat modules: ground assault, air defense and anti-missile, maritime attack and defense, strategic strike, information support and afterloading support, which broke the previous concept that military parades were grouped according to land, sea, air, second artillery and other arms, and highlighted the changes in the operational concept of the People’s Liberation Army.

Both nuclear and regular missile teams

Bomber echelon

The 10 air echelons and nearly 200 planes read are uniform and magnificent. Including air flag protection echelon, leader echelon, early warning commander echelon, fighter echelon, bomber echelon, naval carrier-based aircraft echelon, maritime patrol aircraft echelon, helicopter echelon, refueling and receiving aircraft echelon, covering the existing advanced combat and support aircraft of our army. The air combat elements are complete, the formation is novel and changeable, and the meters and seconds of the large formation are not bad. This fully reflects the improvement of our army’s modern combat level.　

(The original title is "Looking at the military parade from multiple perspectives: Looking at the military parade from the formation of the troops being read")

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.

How to troubleshoot RAID 5 in the server

　　Due to the continuous progress of technology, different types of servers have different treatment methods after RAID 5 failure.

　　At present, the network topology structure of large-scale application programs generally adopts C/S structure or B/S structure, and at least one server with a large database needs to be placed in the central computer room. Considering the security and reliability of the server, RAID (Redundant Array of Inexpensive Disks) is usually used for redundant backup of the server’s disks. Among them, RAID 5 array level is parity disk array without independent parity disk, which adopts data blocking and independent access technology, can process multiple access requests in parallel on the same disk, and allows any hard disk in the array to fail.

　　In practical application, due to some inevitable objective reasons, some array failures may occur. The most common situation is that the hard disk automatically goes offline, and the online status is displayed as DDD (invalid disk drive), and the hard disk has physical or logical failure. If it is a physical fault, only the hard disk can be replaced; If it is a logical fault, it can be repaired by targeted technology to restore the online state of the hard disk, continue to maintain the striped distribution of the hard disk data in its original array, and continue the consistency of the data storage system.

　　However, the data recovery of some old HP servers (such as HP LH6000) is different from that of new HP servers (such as HP ProLian series servers). Therefore, different servers handle RAID 5 failures differently. I have been in contact with the data failure of RAID 5 array card caused by unexpected power failure of two servers, and solved the problem by adopting different strategies.

Fault repair

　　One is HP LH6000 server, and four 18GB hard disks are made into RAID 5 disk array, and its array card is NetRaid. The other is HP ProLian ML370 server. Four 146GB hard disks are made into RAID 5 disk array, and its array card is Smart Array 642 with Hot Spare hard disk. Both operating systems are Window 2000 and the database is Server 2000.

　　The fault of HP LH6000 is as follows: one hard disk is flashing red light, and the machine is still running normally, but it will not be long before the system can not run normally, and then it is found that the red light of another hard disk is flashing.

The solution is as follows:

　　1. start the server, and press Ctrl+M to enter the NetRaid management program when self-checking to the array. Check the array information and find that the hard disk status is Failed, and use the modified configuration to forcibly set a hard disk to OnLine. Restart the server, the hardware self-check before entering the system is invalid, and the startup fails.

　　2. Start the server, and press Ctrl+M to enter the NetRaid management program when self-checking to the array. Select the disk array, manually Fail the hard disk that was originally hung OnLine, and then manually set another Failed hard disk to OnLine, and restart the server to enter the system.

　　3. After checking that the system and database are running normally, enter the array configuration tool and manually set the Failed hard disk to Rebuild, and then restart the server after 100% reconstruction. All arrays and systems are restored to their original state.

　　Another server running ERP system (HP ProLiant ML370) is configured as a RAID 5-level disk array by four 146GB hot-swappable hard disks through RAID cards (Smart array array cards). One of the hard disks suddenly broke down during operation. Server RAID 5 automatically enables the Hot Spare hard disk to logically replace the damaged hard disk. The data access task of the whole hard disk still runs completely in the original reading and writing process sequence, and the application program and database have no influence.

　　Check the hard disk status through the ACU tool that comes with HP, and find that the hard disk with red light warning is offline. If there are two red lights on Raid 5 in HP ProLiant server, it indicates that the system has crashed and the database cannot be accessed, but the system will not shut down automatically. When the second hard disk is red, the data can’t be recovered by conventional means, so we have to pay a professional third-party data recovery company to recover the data.

　　Therefore, for the old HP LH6000 series servers, the array design is quite different from that of the current HP ProLiant series servers. As far as the operation method is concerned, there are many options for the array operation method of HP LH6000 server, including deleting the array again and rebuilding it after the array fails, and the initialization is also manually selected. However, the initialization of HP ProLiant series server array is automatically performed in the background after the array is configured, so the ProLiant series server cannot reconfigure the array after an array error.

　　The HP LH6000 server will cause the disks in the array to be disconnected for other unexpected reasons, so the maintenance personnel can manually choose Online or Offline, Rebuild, etc. to restore the data. However, the current HP ProLiant series servers will no longer have the phenomenon of disk disconnection in the array like the old servers, so when the hard disk is red, it is basically damaged and needs to be replaced. Of course, you can choose to Rebuild the hot-plug hard disk and see if the hard disk can be used for a while.

Do a good job of technical backup

　　From the above two examples, it can be seen that the troubleshooting of Raid 5 disks of servers of the same brand and different series is different because of their different embedded technologies. But after Rebuild the data, the data was saved, from which the following experiences can be drawn:

　　We believe that any advanced technical means is not foolproof. If you want to ensure data security, you must do a good job of backup, and it is best to do a remote backup of the database once a day. Spare at least one new hard disk. It should be pointed out that the hard disk that joins the array must be greater than or equal to the capacity of the failed hard disk.

　　If conditions permit, the array creation scheme of "RAID 5+ hot spare" is recommended. This way, we have two chances to replace the hard disk before the data is lost. For general applications, only RAID 5 is needed, which can provide data access performance, reliability and maximum disk space at the same time.

　　Administrators must always observe the status of the array, including the yellow warning light of the disk array and the drive status in the management software. Trouble shooting in time. No matter what level of array, data backup should be done before troubleshooting.