2. Alternate astronauts: Chen Quan, Fei and Nie Haisheng.
3. From September 25th to 28th, 2008, the manned space flight of Shenzhou VII was a complete success, which was a highlight in China's space history, symbolizing that China became the third country in the world to independently master the key technologies of extravehicular activities, which made a solid step for China people to explore space and opened a new page for the Chinese nation to travel in space.
Extended data:
On September 25th, 2008, 2 1: 10: 04: 988, the Shenzhou VII manned spacecraft was launched from Jiuquan Satellite Launch Center, and astronauts Zhai Zhigang, Liu Boming and Jing Haipeng flew into space.
On the afternoon of September 27th, 2008, astronaut Zhai Zhigang successfully got out of the capsule for the first time in China. The success of Shenzhou VII manned space flight indicates that China has become the third country in the world to independently master the key technologies of extravehicular activities, and the Chinese dream of spacewalking has finally come true.
In order to simulate and train astronauts to work in weightlessness, neutral buoyancy tanks can be used to produce weightlessness on the ground. Its principle is that when people are underwater, gravity and buoyancy are equal, that is, neutral buoyancy, and the feeling and effect of simulated weightlessness are obtained.
China Astronaut Center has the largest neutral buoyancy simulated weightlessness training cabin in Asia. The water tank is10m deep and 23m in diameter. Water is pumped from the groundwater below1700m, and ozone is added for disinfection and sterilization.