On September 25, 2008 (August 26, 2008 in the lunar calendar), the Shenzhou-7 manned spacecraft was successfully launched. Astronauts Zhai Zhigang (center), Liu Boming (right) and Jing Haipeng of the Shenzhou-7 spacecraft warmly celebrated the safe return of the astronauts of the Shenzhou-7 spacecraft. The Shenzhou-7 manned spacecraft was launched into space with a Long March 2F rocket from the Manned Space Launch Site of the Jiuquan Satellite Launch Center in China at 21:10:04:988 milliseconds on September 25. The spacecraft successfully landed at the main landing site of Siziwang Banner, Inner Mongolia, China at 17:37 on September 28, 2008. The Shenzhou-VII manned spacecraft is one of China's Shenzhou spacecraft series. It was launched into space with the Long March 2F rocket and is China's third manned spacecraft. Introduction to Shenzhou-7 Shenzhou-7 is China's third manned spacecraft and one of China's "Shenzhou" series of spacecraft. China's first spacecraft to carry out extravehicular operations. It was launched into space by the Long March 2F rocket at 21:10:4 seconds and 988 milliseconds on September 25, 2008 Beijing time. There are three astronauts on board Shenzhou-7: Zhai Zhigang (commander), Liu Boming and Jing Haipeng. Zhai Zhigang's extravehicular operations, and Liu Boming assisted in the orbital module, achieved the first spacewalk in China's history, making China a country capable of conducting spacewalks. The spacecraft successfully landed in Siziwang Banner, Inner Mongolia, China at 17:37 on September 28, 2008, Beijing time. The Shenzhou-7 spacecraft flew for a total of 2 days, 20 hours and 27 minutes. The Shenzhou-7 spacecraft consists of an orbital module, a return module and a propulsion module. The Shenzhou-7 spacecraft has a total length of 9.19 meters and consists of an orbital module, a return module and a propulsion module. The Shenzhou-7 manned spacecraft weighs 12 tons. The overall height of the Long March 2F launch vehicle and escape tower combination is 58.3 meters. Structural orbital module: It serves as a working and living module for astronauts, as well as an airlock module for exiting the module. It is equipped with functions such as pressure relief control and extravehicular spacesuit support. There are astronaut living facilities inside. The top of the orbital module is equipped with a small satellite accompanying it and five re-pressure cylinders. No track retention function. Re-entry module: Shaped like a bowl, it is used for astronauts to return to Earth. Connected to the orbital module. Equipped with parachutes and anti-thrust rockets to achieve a soft landing. Propulsion module: Contains the propulsion system, as well as part of the power supply, environmental control and communication systems, and is equipped with a pair of solar panels. The Shenzhou-7 carrier rocket was launched into space at 21:10:4 seconds and 988 milliseconds on September 25, 2008; 120 seconds for the rocket to throw off the booster and escape tower; 159 seconds for the first and second stages of the rocket to separate;200 seconds for the fairing to separate;500 seconds for the third-stage rocket to shut down;583 seconds for the spacecraft to separate from the rocket; The spacecraft then entered the predetermined orbit normally, and the Shenzhou-7 spacecraft was successfully launched. The track change control program was started at 04:03 on September 27, 2008, and the track change was completed at 04:04. The extravehicular spacecraft entered orbit. After orbiting the earth for more than five times, Zhai Zhigang took place at 16:35. With the help of Liu Boming and Jing Haipeng, astronaut Zhai Zhigang opened the hatch and began extravehicular activities. Zhai Zhigang first poked his head out and waved to the default closed-circuit camera outside the cabin, and then walked out of the cabin. Liu Boming also poked his head out of the cabin and handed Zhai Zhigang a small five-star red flag. Zhai Zhigang took the five-star red flag and waved it at the camera for a moment. Zhai Zhigang then retrieved the solid lubrication test samples loaded outside the cabin. 16:58 The astronauts successfully completed extravehicular activities and returned to the orbital module. 17:01 The orbital module door closed. Four major scientific experiments of Shenzhou-7 According to experts, the Shenzhou-7 manned space flight will carry out four major scientific experiments and achieve the four firsts of China's manned space flight, that is, astronauts must achieve extravehicular space, and astronauts must release accompanying small satellites, conduct scientific research on extravehicular space materials, and implement the first application of "Tianlian-1". Among them,"China astronauts walked in space for the first time" is undoubtedly the most interesting topic in this space activity. This will also become the fourth milestone after my country's aerospace industry after "Dongfanghong-1","Manned Space Flight" and "Chang'e-1". The full text is summarized as follows: We are full of pride and joy at the arrival of this exciting moment. 1.3 billion China people have witnessed this historic moment. The first step taken by China astronauts out of the spacecraft door into space marks another new beginning for China's space industry. It marks a brand new beginning. From the first visit of the Shenzhou-1 unmanned spacecraft to space in 1999 to Fei Junlong and Nie Haisheng joining hands with Wentian on the Shenzhou-6 in 2005, the six-year journey has engraved six perfect steps for China people and six new breakthroughs in China's space industry. From launch, return, measurement and control, environmental control, difficulties in various key technical links have been overcome one by one, witnessing the unremitting pace of development and pursuit of exploration by China astronauts. We have finally ushered in a historic moment that will surely be remembered by history. This "first step" into space will make China extremely proud and proud. Once upon a time, New China was still "poor and poor". Its science and technology fell far behind Western countries, and even it relied on imports of matches and kerosene. Who would have thought that in just a few decades, China had undergone earth-shaking changes. History will record that the development of China's aerospace industry will never forget that on April 24, 38 years ago, a melodious music "The East is Red" came from the deep and mysterious space, piercing the night sky and echoing across the earth. We will also never forget that when Yang Liwei stepped out of the re-entry capsule of the Shenzhou-5 manned spacecraft, China became the third member of the international "Space Club." This is enough to make China proud and take the most solid step for the sustained and rapid development of China's space industry. It indicates the future development of the country's aerospace industry. Considering a country's comprehensive national strength is also the key to whether a country can always maintain a leading position in the field of high-tech. It fully demonstrates the vital role played by national scientific and technological forces in developing and promoting aerospace technology. It represents the economic and social foundation of a country and also foreshadows the development and future of the country and the nation. Today, it coincides with the 30th anniversary of China's reform and opening up. The results of reform and development over the past 30 years are obvious to all: the economy is changing with each passing day, the people live and work in peace and contentment, the society is stable, the country is prosperous, and the people generally enjoy the fruits of reform and development. The launch of the Shenzhou-7 spacecraft will be another vivid witness of the achievements of reform and opening up, another great achievement in my country's reform and opening up and socialist modernization, and another important milestone in my country's high-tech development. At this glorious moment, hundreds of millions of Chinese people should be proud and proud of their great motherland. The "first step" left by China astronauts in space is a major step in China's aerospace history. It is an inevitable result of practicing and implementing the Scientific Outlook on Development and vigorously promoting the spirit of "two bombs and one satellite" and the spirit of manned spaceflight. We have every reason to believe that the "first step" taken by China astronauts into space will lead an era and open up a new century. (Source: People's Daily Online-Hong Kong and Macao Channel) The spacecraft realized its orbit change this morning. China astronauts are expected to take the "first step in space" on the afternoon of the 27th.[Special article of Caijing Network/Reporter Yu Dawei] On September 25, 2008, at 21:10:04,"Shenzhou 7" was successfully launched from the Jiuquan Satellite Launch Center. 200 seconds later, the spacecraft fairing separated;583 seconds later, the ship and rocket separation was completed at an altitude of 200 kilometers. Twenty minutes later, Chang Wanquan, commander-in-chief of China's Manned Space Engineering Project and director of the General Armament Department, announced that the "Shenzhou-7" spacecraft had entered the predetermined orbit and the launch was a complete success. This is the 67th consecutive successful launch of the Long March series rockets. After entering an elliptical orbit with an apogee of 347 kilometers and a perigee of 200 kilometers, the "Shenzhou-7" spacecraft flew five times along this orbit (about 90 minutes per orbit); at 4 a.m. this morning, the spacecraft was successfully transferred. After orbiting, it entered a 343-kilometer near-circular orbit. According to the plan, when the spacecraft completes its 27th orbit, the two astronauts will enter the orbital module and close the return module hatch. Based on about 90 minutes per lap, the two astronauts will enter the orbital module about 40.5 hours after orbiting, that is, around 2 pm on the 27th, and close the return module hatch. There will then be about three hours of preparation for extravehicular travel, during which the spacecraft will fly twice. The astronauts began to walk extravehicular at about 5 pm on the 27th, and the entire spacewalk is expected to take about 30 minutes. Yuan Jiajun, commander-in-chief of the Shenzhou spacecraft, also revealed in an interview after the successful launch that the extravehicular activities will take place on the afternoon of the 27th. According to current general estimates, Zhai Zhigang and Liu Boming will enter the orbital module together, while Jing Haipeng will remain in the return module. Among them, Zhai Zhigang will wear the domestically produced "Feitian" extravehicular spacesuit, and Liu Boming will wear the Russian-made "Seahawk" spacesuit. Due to the consideration of China experts, Zhai Zhigang, wearing a domestic space suit, will be sent to complete the extravehicular mission since the most important part of this mission is to break through extravehicular technology. Outside the cabin, the astronauts will use extravehicular movable handrails, bolting fixtures, etc. to move along the outer wall of the orbital module, and retrieve test samples of solid lubricating materials outside the cabin. A CCD stereo camera was then used to take photos of the "Shenzhou VII" at close range. In addition, the astronauts also performed simulated operations such as screwing screws and equipment installation. On the 25th, Zhou Jianping, chief designer of the manned spaceflight project, said in an interview with a Xinhua Agency reporter at the Jiuquan Satellite Launch Center that in addition to extravehicular activities,"Shenzhou VII" also undertakes three other tasks, including conducting extravehicular exposure tests for solid lubricating materials and solar cell plates in space, releasing small satellites accompanying the orbital module and testing for the "Tianlian-1" space relay terminal. "Tianlian-1" will increase the sky coverage of China's ground monitoring and control personnel by 50%, establish a monitoring and control network integrating land, sea and space, and further lay a better foundation for future manned space missions such as rendezvous and docking that require higher monitoring and control coverage. Compared with the Shenzhou 6 flight, the Shenzhou 7 flight manual has increased from three to seven, and the number of operating units required by astronauts has increased from hundreds to more than 1,000, and each operating unit also contains dozens of steps and hundreds of actions. Before the "Shenzhou VII" took off, Zhang Jianqi, deputy commander-in-chief of the manned space project, said in an interview with China Central Television that foreign astronauts usually leave the cabin 72 hours after liftoff, so that astronauts can adapt to weightlessness in space. However, the astronauts of the "Shenzhou 7" mission will leave the cabin the day after liftoff. Therefore,"Shenzhou 7" has particularly high requirements for astronauts. The level and ability of the astronauts will determine the success or failure of this extravehicular mission.