After the P40 was released in China, Yu Chengdong said in an interview with the media that this phone no longer has Google's stuff, and Huawei phones can use American devices because they have completely replaced them.

The above remarks caused widespread concern, and some people even questioned Yu Chengdong's bragging. In the latest interview, Ren Zhengfei was asked this question. He said that Yu Chengdong did not brag about it, and it was OK to use American spare parts.

However, Ren Zhengfei said that Huawei does not use American parts, what if others do not buy it. Android and Apple's operating system sales are huge in the world, and consumers are already familiar with these two operating systems. Huawei is a latecomer, and it is difficult for consumers to recognize our operating system. Therefore, it may take a long time for Huawei's operating system to surpass the operating systems of Android and Apple, but it will not exceed 300 years.

Ren Zhengfei bluntly, Huawei has a very friendly relationship with Google and Apple. Although our mobile phones are not equipped with Android systems, Samsung and other brands of mobile phones are available. Our 5G base stations are sold worldwide. Apple, Samsung and other brands of mobile phones use our base stations With ecology. We want to thank Apple and Android. 5G performance has been well played, which is equivalent to helping us. Android is doing us a favor, and Apple is doing us a favor too. If they don't have their ecology, what's the use of our base station?

Therefore, Huawei's operating system does not have vicious competition, just saying that when others do not give us a way out. Our operating system has only just begun, the Android ecosystem has 2.8 million apps, and our ecosystem has tens of thousands, with a huge gap. Of course, our system is post-developed and will have some advantages, but the advantages must be recognized after the consumer experience.

1.It's not time to remove the mask

Now is not the time to remove the mask. The situation at home and abroad is now very different. China has entered the second stage of the epidemic due to very decisive measures, while some other major countries are still in the first stage of the outbreak and are still climbing upwards. This means that the probability of person-to-person transmission is very high, and the number of confirmed cases is increasing very quickly. Wearing a mask is still a very important means of self-protection, and it is too early to propose not to wear it. However, in areas where the epidemic is not serious, places with few people or empty places are not necessarily worn.

2.Wuhan has passed the level, but there is still the next level

When the epidemic broke out, the central government took decisive action to control and control the urban traffic in Wuhan. It was very successful to adopt mass prevention and control measures elsewhere. In the history of epidemic prevention and control, this is also a feat.

There are still two tests ahead. One is how to control and resume work at the same time, and the other is the "external defense input" off. At present, foreign countries are still at the peak of outbreaks. Some large coastal cities in China, which have close exchanges with foreign countries, are easily involved and some outbreaks occur. They also need to pass various prevention and control measures.

3.The possibility of overseas outbreaks causing a second outbreak in China is small

Will overseas imported cases continue to appear, will it cause community transmission and trigger a second outbreak in China?

This is actually two problems, one is whether the imported cases have spread, and the other is whether there will be an outbreak during the spread. The risk of transmission of imported cases abroad must exist, especially in cases where the nucleic acid test is positive or the symptoms of infection have occurred, the infection is relatively strong and will cause the virus to spread.

Will it cause an outbreak? It is estimated that the possibility is relatively small. Group prevention and control in our country has been sinking into the community, and community residents have a strong sense of self-protection, such as wearing masks and keeping in touch with people. Once someone has symptoms such as fever, they can quickly report or receive a diagnosis, and isolation. Overall, there is definitely a danger of community transmission, but the second wave of outbreaks in China is very unlikely.

4.It is too early to talk about the turning point of the global epidemic

From a global perspective, the epicenter of the original epidemic was in Europe, especially Spain and Italy, and now includes Germany, France, and the United Kingdom. The biggest problem is the United States, which has been increasing at a rate of 10,000 or 20,000 cases per day in the most recent week. Therefore, it is still early to see the turning point.

At the inflection point, it depends on whether the government can intervene forcefully. There are many unpredictable factors in other countries, so it is much harder for me to predict the global inflection point than it is to predict China. As this situation continues to develop, I am afraid it will take another two weeks.

5.The proportion of asymptomatic infections in China will not be very large

Asymptomatic infections do not occur out of thin air, and usually appear in two groups: one is in areas where the epidemic is relatively serious, but people who have not yet shown symptoms but may have been infected. The other is close contacts of confirmed cases. Their proportion is still relatively small.

There are also two concepts for asymptomatic infections. One is that there is no symptoms at first, but then it will gradually develop to be symptomatic. This type is definitely infectious. The other type is what we discovered recently. During quite a long period of observation, there is no symptom, but the nucleic acid test is positive. We are studying this type of infectiousness. However, according to the characteristics of the new coronavirus, once the symptoms appear, the infectivity is relatively strong, so it is right to isolate them and observe them as a group of people.

6.Most patients in Fuyang are not infected

The so-called "Fuyang" is mostly a fragment of nucleic acid rather than the virus itself. Two conditions need to be noted. The first is whether the patient himself relapses. If the patient produces a strong antibody, it will generally not be infected again. As for whether the patients of Fuyang will be transmitted to others, specific analysis is needed. Generally, nucleic acid fragments are not contagious. Some scholars have cultured pharyngeal swabs and secretions of patients in Fuyang, but no virus has been cultured. A

There is also a rare case where the patient has many basic diseases originally, but the symptoms have improved and they have not fully recovered. These patients cannot be ruled out as infectious.

Overall, I do n’t worry too much about patients with reinfection.

7.There is insufficient evidence for the flu of new coronary pneumonia

Will New Coronary Pneumonia last as long as the flu?

This is a school of thought. As of now, there is insufficient evidence. Unless the virus spreads such a pattern: its infectivity is still strong, but the case fatality rate is getting lower and lower, in this case, there is a possibility of long-term existence. We now need to make a long-term observation and grasp sufficient data and cases before we can draw a view like this. In the current situation, I don't think this prediction will be realistic.

8.Inter-animal communication is now too early to draw conclusions

It remains to be seen whether some animals, such as dogs, cats and tigers, have tested positive for nucleic acids, whether they are caused by pollution or infected. Some animals already carry some viruses, which may not be symptomatic and may not be contagious. It is now believed that the new coronavirus in these animals can infect both humans and animals, and can cause disease. The conclusion is too early, and I generally do n’t look at it that way.

9.There are no special medicines, but some effective medicines are found

Some of the drugs we are currently experimenting with, such as chloroquine, the results of the experiment are definitely valid, we are summarizing and may be published soon. There are also some traditional Chinese medicines, such as Lianhua Qingwen. Not only did we perform in vitro experiments, but we also found in P3 laboratory (that is, the third-level laboratory of biosafety protection, editor's note) that its antiviral effect is not strong, but it is anti-inflammatory The performance is outstanding, and the relevant experimental results will be published soon. In addition, there is the Chinese medicine Xuebijing. Its main components include safflower, salvia, red peony, etc., which are used for promoting blood circulation and removing blood stasis. It is also effective for the treatment of severe patients.
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10.the vaccine will not be listed soon

Vaccines are really important to really end the epidemic. Now countries are developing at the fastest rate. But I don't think the vaccine can be made in three or four months. In addition, according to the experience of fighting against SARS, removing the intermediate host can also stop the spread of the epidemic. At present, we do not yet know what the spread chain of the new coronavirus is, and it is also important to cut it off after figuring it out.

Putting all hope on the vaccine, regardless of other methods, is negative. Moreover, after the vaccine comes out, it is impossible to be perfect at a time. The susceptible people can be vaccinated, but it is not necessary for everyone to be vaccinated.

11.Mass immunization is the most negative approach

The most negative way to deal with the epidemic is the so-called mass immunization. This was the idea more than a hundred years ago. At that time, humans had no choice but to let the virus infect. People who survived the infection naturally obtained antibodies. I do not agree with this method to deal with the new coronavirus now. Over the past 100 years, mankind has made great progress, there are many ways to prevent it, no need to use natural immunization, group immunization.

12.The most worthwhile experience shared by China in the fight against epidemic disease is its execution

China's war epidemic has mainly taken two major measures: one is to block outbreak areas and block the spread; the second is grassroots group prevention and control, that is, joint prevention and control. Now there are two cores of prevention and control, the first is to maintain distance, and the second is to wear a mask.

Therefore, the most shareable experience is execution. The medical level and technical strength of many countries are much higher than those of China. The reason why they were caught off guard by the epidemic was because they did not have the ideological preparation and did not take decisive measures to cause many front-line medical staff to become infected. It is easy to get out of control.

Recently, China's first 20-kilowatt high-power Hall thruster, developed by China Aerospace Science and Technology Group Co., Ltd. 801, successfully completed the ignition test. The ignition time totaled 8 hours and the number of ignitions exceeded 30 times. The successful research and development of this thruster has realized the thrust of Hall electric thruster in China from millinewton to cattle.

During the test, the thruster had reliable ignition, stable operation, and stable working parameters. The measured thrust was 1 N, the specific impulse was 3068 seconds, and the efficiency was greater than 70%. The performance index reached the international advanced level.

Some Hall Thruster Products

It is reported that the thruster is designed with new technologies such as hollow cathode centering and long magnetic shield life. During development, key technologies such as high-current hollow cathodes, lightweight and compact accelerators, efficient thermal management, and high-voltage and high-power stable discharge have been adopted. They have the characteristics of large thrust, high specific impulse, long working life, and high reliability. Geostationary orbit) satellites, medium / heavy all-electric push platforms, deep space probes, earth orbit space transport platforms, space shuttles and other spacecraft, orbital maneuvering, providing efficient dynamic support for orbital maintenance and attitude control tasks.

After Amazon announced that it has exceeded 100 million devices integrating Alexa voice assistant, Google announced that its voice assistant Google Assistant has more than 500 million active users.

Google also revealed the upcoming new features of Google Assistant, including: reading articles and web pages for users with a more natural human-like voice, which will be extended to read e-mail in the future; through cooperation with TV manufacturers such as Hisense and TCL, Google Assistant will be able to turn off the TV; others include redesigned speed dials, on-screen cards, and new privacy-conscious voice commands. Google hopes more TV manufacturers will install microphones for far-field voice recognition.

On December 27, the State Council Office held a press conference on the first anniversary of the global service provided by the Beidou III system. Ran Chengqi, director of the China Satellite Navigation System Management Office and spokesperson of the Beidou Satellite Navigation System, stated that in 2019 all Beidou-3 medium-Earth Earth Orbit (MEO) satellites will be networked, marking the completion of the deployment of the core constellation of the Beidou-3 system. By June 2020, it plans to launch two more geostationary orbit satellites, and the Beidou-3 system will be fully completed. In 2025, a more comprehensive, integrated, and intelligent national integrated positioning and navigation timing system with the Beidou system as the core will be built.

On December 27, the stock prices of satellite navigation companies such as Huashang Navigation, Zhonghaida, and Big Dipper all rose to varying degrees. Data show that the total output value of China's satellite navigation and location service industry reached 301.6 billion yuan in 2018, an increase of 18.3% over 2017. Among them, Beidou contributed 80% to the core output value of the industry. Ran Chengqi predicts that the scale of this industry will exceed RMB340 billion-350 billion this year, and it will maintain a growth rate of about 20% in the future.

Build a characteristic application service system

Ran Chengqi said that on November 19, 2018, China completed a basic system consisting of 19 Beidou navigation satellites, and will provide global services by the end of the year. This year, China has completed the launch of 7 arrows and 10 stars, and completed the deployment of a core constellation consisting of 24 medium orbit satellites. "Based on the ability to provide global services last year, it is more reliable, with higher accuracy and better performance. The completion of the deployment of the core constellation indicates that the Beidou III has entered a critical stage of finalization."

Currently, Beidou is used for satellite navigation of most smartphones. Ran Chengqi said that in addition to providing basic services of positioning, timing and navigation, Beidou satellite navigation system also has many characteristic application service systems.

The 1.0 version of the satellite navigation system application service system released on the site shows that there are six types of applications, including satellite-based enhanced services, precision single-point positioning services, regional short message communication services, global short message communication services, ground-based enhanced services, and international search and rescue service. According to Ran Chengqi, these six types of distinctive applications are the characteristics that distinguish Beidou from other innovative applications of navigation systems.

While improving the system construction, the service capability of the Beidou III system is also improving. According to Ran Chengqi, Beidou System has improved the system's intelligent operation and maintenance capabilities to ensure continuous and stable operation. Service performance, availability, and continuity have reached the expected requirements. Performance levels and elevation positioning accuracy are better than 5 meters. Next year, the BeiDou-3 system will provide users with diversified services with higher accuracy, better performance and stronger functions.

Ran Chengqi said that the construction of the Beidou short message application service platform has been started. It will be combined with mobile communication technology in the future to provide more convenient services for mass users. "The volume, weight, and power consumption will be greatly reduced. It will enter smart terminals such as mobile phones. This is a very important innovative service."

In terms of ground-based enhancement services, Beidou Satellite Navigation System combines traffic, surveying, mapping, earthquake, meteorology, and land and other industry monitoring station network resources. More than 2,000 reference stations have been built to provide real-time meter-level, decimeter-level, and centimeter-level enhanced positioning accuracy service. At present, the service has more than 400 million users worldwide and provides more than 1 billion services per day.

Ran Chengqi revealed that with the advent of the 5G commercial era, Beidou is accelerating the integration with new technologies such as new-generation communications, blockchain, and artificial intelligence. The business integration of Beidou with traditional applications such as transportation, agriculture, forestry, animal husbandry and fishing, and power and energy has continued to deepen, the scale has been further expanded, and the results have been further manifested. For example, the dynamic monitoring system for operating vehicles constructed and operated by the Ministry of Transport has more than 6.5 million vehicles connected to the network, and it is making in-depth progress in railway transportation, inland navigation, ocean navigation, air transportation and transportation infrastructure construction management.

Industrialization takes another step

Ran Chengqi introduced the latest progress of Beidou industrial chain industrialization at the press conference.

22nm process RF baseband integrated navigation and positioning chip supporting the new signal of BeiDou III, which is smaller, lower power consumption and higher accuracy, has achieved large-scale applications; a new generation of BeiDou high-precision antennas, boards, and broadband RF chips Research and development of other series of products have been completed, and the performance indicators have continued to improve, and they have been equipped for large-scale application and promotion. Overseas mainstream manufacturers have launched basic products of the new signal of Beidou III.

According to the "China Satellite Navigation and Location Services Industry Development White Paper (2019)", the number of enterprises and institutions in China's satellite navigation and location services industry is currently about 14,000, with more than 500,000 employees. As of the end of 2018, the total number of listed companies and NEEQ companies in the industry was 51. Key technologies such as domestic Beidou chips and modules have made further breakthroughs in 2018, with performance indicators comparable to similar international products, and have formed a certain price advantage. By the end of 2018, the cumulative total of China's satellite navigation patent applications had exceeded 60,000, ranking first in the world. The number of patents published in 2018 reached 12,684, breaking a new high again.

The above white paper shows that in 2018, China's regions with traditional development advantages in satellite navigation and location service industries will further increase their efforts and comprehensively promote the innovative development of the Beidou industry. In 2018, the five major areas of satellite navigation and location service industry development in the Pearl River Delta, Beijing-Tianjin-Hebei, the Yangtze River Delta, central and western regions achieved an overall output value of 238.8 billion yuan, accounting for 79.6% of the total output value of the national satellite navigation and location service industry.