According to CCTV news, as of 6:00 today, tianwen-1 Mars probe has been in orbit for 163 days, with a flight mileage of more than 400 million kilometers, about 130 million kilometers from the earth and 8.3 million kilometers from Mars.

China Aerospace Group official said that tianwen-1 Mars probe has a stable attitude, and will implement near fire braking in more than one month as planned, enter the annular fire orbit, and be ready to land on Mars.

Tianwen-1 mission is the first step of China's independent interplanetary exploration. It will realize the "orbit, landing and patrol" of Mars through a single launch, that is, Mars orbit, Mars landing and fire surface patrol.

The total weight of tianwen-1 is about 5 tons. It is composed of a orbiter and a landing Rover. The landing Rover mainly includes an entry module and a Mars rover. At present, the orbiter has completed the third on orbit self-test, and all systems are working normally.

Five vaccines in China enter phase III clinical trials

At the press conference, Chen Shifei, deputy director of the State Drug Administration, said that Sinopharm's China Bio new crown inactivated vaccine had been approved by the State Drug Administration for conditional marketing. The existing data show that the protection rate is 79.34%, achieving the unity of safety, effectiveness, accessibility and affordability, meeting the relevant standards of who and SFDA. In the future, the persistence and protective effect of the vaccine should be observed continuously.

In addition, Xu Nanping, Vice Minister of the Ministry of science and technology, said that so far, 14 vaccines from five technical routes have entered clinical trials in China, of which five vaccines from three technical routes have entered phase III clinical trials.

Grant of new vaccines in Beijing and Hubei
At the press conference, Chen Shifei said that the drug regulatory and inspection institutions in Beijing and Hubei Province have been awarded the task of issuing the new crown vaccine in batches. In accordance with relevant regulations and administrative measures, the batch issuing agency will strictly audit and inspect each batch of vaccines to ensure that each vaccine is qualified.

Does the new coronavirus mutation affect the efficacy of the vaccine?

At the press conference, Xu Nanping said that the scientific research team has held many meetings, and experts believe that there is no evidence that the new coronavirus mutation will have a substantial impact on the use of the vaccine, but it needs high attention.

What is the price of the approved vaccine?

Zeng Yixin, deputy director of the National Health Commission, said that the basic attribute of the new coronavirus vaccine is public goods, and the price will change according to the scale of use, but one major premise is definitely to provide free for all.

Over 3 million doses of the vaccine have been given to key population in China, with good safety
At the press conference, Zeng Yixin introduced the vaccination work of key groups of Xinguan vaccine. He said that China's vaccine research and development has always been the first in the world
Since the official launch of vaccination work for key population on December 15, the cumulative number of inoculations has exceeded 3 million.

The results of vaccination fully proved that the safety of vaccine in China was good, a certain proportion of adverse reactions occurred, and the total incidence was close to that of conventional inactivated vaccine.

The main performance is local pain, induration, mild fever rate is less than 0.1%, allergy and other serious situation is two parts per million, these situations after timely treatment are very good treatment.

Next, we will comprehensively promote the vaccination of the elderly and people with basic diseases, and then carry out the vaccination of other ordinary people. In the future, all the eligible people will be able to "receive as much as possible.".

Sinopharm China Biological New Crown inactivated vaccine has been approved by the State Food and Drug Administration for conditional listing

Vaccine research and development will never "rush" for the first place

At the press conference, Zheng Zhongwei, head of the working group of new crown vaccine research and development, said that the vaccine research and development process is a race against the virus, but we fully respect the scientific laws and principles of vaccine research and development.
China is the first to carry out clinical trials, and also the first to carry out phase III clinical trials. However, due to the good control of the epidemic situation in our country, we carry out clinical trials abroad, strictly abide by the relevant rules in the process of clinical trials, and will never "rush" for the first place.

Turkish health minister Kejia said on the evening of the 24th that Turkey has confirmed that the new inactivated vaccine developed by China's Beijing Kexing zhongweisheng Technology Co., Ltd. is effective and safe for the Turkish people.

Kejia said at a news conference that night that the preliminary analysis of the data of volunteers who voluntarily vaccinated with kexingxinguan vaccine in Turkey showed that the effectiveness of kexingxinguan vaccine reached 91.25%, and no serious side effects were found during the clinical trial. China has approved the export of vaccines to Turkey. If all goes well, the first 3 million doses of vaccines from China will arrive in Turkey in the near future.

Kejia also said that in the first stage, 9 million people will be vaccinated, mainly for high-risk groups such as medical staff.

Data released on the website of Turkey's Ministry of health on the 25th showed that 201104 people in Turkey were tested for new coronavirus on the same day, with 17543 newly diagnosed cases, of which 3199 were symptomatic infections, with a total of 2118255 confirmed cases; 256 new deaths, with a total of 19371 deaths; 1970803 cured cases.

In addition to Turkey, the Brazilian health department also disclosed the effectiveness of China's Kexing vaccine, which met the international standards. Kovas, director of Brazil's Butantan Research Institute, said that the Chinese vaccine is the safest currently tested in Brazil, and it has given the Brazilian people light.

December 28 news: on the morning of May 23, 2019, China launched the remote sensing 33 satellite with the long march 4C carrier rocket at the Taiyuan Satellite Launch Center. The third stage of the rocket and the debris of the satellite fell, so the satellite launch was declared a failure.

According to CCTV news, at 23:44 on December 27, 2020, China successfully launched the remote sensing 33 satellite into the predetermined orbit with the long march 4C carrier rocket at Jiuquan Satellite Launch Center, and the launch was a complete success. At this point, China's space industry has a perfect ending in 2020.

It is worth mentioning that the mission also launched a micro nano technology test satellite.

China's successful launch of rs-33 satellite brings China's space industry to a perfect end in 2020.

Remote sensing satellite 33 and micro nano technology test satellite are mainly used in scientific experiments, land and resources census, agricultural product yield estimation, disaster prevention and mitigation and other fields. This mission is the 357th flight of long march series launch vehicles.

At 12:37 on December 22, the first flight test of Long March 8, a new medium-sized carrier rocket developed by China, was successfully carried out at Wenchang space launch site in Hainan. The rocket flew normally and the test was successful. The successful first flight of Chang-8 rocket will fill the gap of China's 3-4.5-ton carrying capacity in sun synchronous orbit and lay a solid foundation for the development of China's reusable launch vehicle.

At 12:37 on the 22nd, with a loud noise, the Long March 8 carrier rocket made its first flight at Wenchang space launch site in Hainan, successfully sending five satellites into the scheduled orbit.

As a new generation of China's launch vehicle, the long march eight is about 50 meters long and takes off about 360 tons. The green liquid propellant is developed according to the modular combination idea, which fully absorbed the research results of the in service and new generation launch vehicles, and has good inheritance, advanced nature, adaptability and economy. Mu Yu, director of the overall design department of the first Academy of China Aerospace Science and Technology Corporation, introduced that the Long March 8 rocket is mainly used to launch the sun synchronous orbit (SSO) satellite, and takes into account the launch capacity of low earth orbit and geosynchronous transfer orbit. It will fill the gap of China's 3-4.5-ton carrying capacity in sun synchronous orbit, which is of great significance for accelerating the upgrading and upgrading of launch vehicles. "Through the minimum cost: the development cycle is very short, and the formal project development (has) for two or three years, we can form combat effectiveness. It is equivalent to the improvement of our carrying capacity in the sun synchronous orbit, and it can make up for some gaps in our previous orbit (capacity), and also carry out the non-toxic and pollution-free update of the power system.

Of course, the launch of new launch vehicles is bound to be accompanied by some risks and challenges. On the eve of the test launch, the launch mission originally planned to be carried out on the 20th was delayed due to environmental factors such as high-altitude wind. The reporter learned that due to the compact structure and light weight of the new launch vehicle, the flight attitude has very high requirements for the protection of high-altitude wind environment. Pan Hao, chief designer of the Long March 8 rocket control system of the first Academy of China Aerospace Science and technology group, further explained, "because of the typhoon's transit, its method is to identify and control (the mode). That is to say, the wind must blow first. I feel the wind coming, and then I will produce corresponding actions to offset such a way. But when the wind is really very strong and fast, the rocket has no time (reaction) and can't react. Because unlike other small aircraft, the arrow is more sensitive. The rocket is bigger, it moves more slowly. When the wind changes faster than the rocket, it is impossible to make a very timely and effective response.

It is understood that the Long March 8 launch vehicle is China's first commercial launch vehicle approved by the state. While carrying out low-cost electrical and structural design, it may be reusable in the future through vertical takeoff and landing research. Mu Yu said, "in the future, the Long March 8 will be further optimized for commercial launch, including the optimization of technical solutions, so that its launch cost will be lower. We will also try to carry out the verification and exploration of reuse technology, further reduce the cost and threshold of our access to space, making it possible for us to launch a large number of missions. "

Compared with the past, the engine throttling technology has been adopted for the first time in the Long March 8 launch vehicle, which aims to optimize the rocket's carrying capacity to the greatest extent and lay a foundation for the recovery of the following core stage engines.

It is reported that this mission is the 356th launch of the long march series launch vehicles.