On the night of November 29, the Long March 2F Remote 15 carrier rocket accurately sent the Shenzhou 15 manned spacecraft into the scheduled orbit. This is the sixth flight mission of China's manned space program this year and the last flight mission in the construction phase of the space station. In this mission, the astronauts of the Shenzhou XIV and Shenzhou 15 crew will rotate on orbit for the first time, and the astronauts of the Shenzhou 15 crew will work and live on orbit for six months. What new changes will the space station face when it enters the long-term manned phase? What missions will the Shenzhou 15 flight crew undertake in the next six months? Highlights 1: The launch safety and adaptability index of manned rockets have been further improved. The Long March 2F carrier rocket on this expedition is the only type of manned rocket in China at present. It has carried out all the launch missions of manned spacecraft and target aircraft since Shenzhou I, with a success rate of 100%. It is known as the "Divine Arrow". Always taking high reliability, high safety and high adaptability as the primary goal, the design index of the Long 2F rocket was far higher than the international standard from the beginning of development. "During this launch, the researchers continued to focus on the weak links, and the reliability of the rocket was further improved." Chang Wuquan, chief designer of 2F Rocket, the first president of Aerospace Science and Technology Group, said. "This is the first time that a new batch of Long 2F rockets and new ground equipment have been used in manned launch missions. Compared with the last launch of the Remote Fourteenth Rocket, the Remote Fifteenth Rocket has been comprehensively upgraded and optimized." Liu Feng, the deputy chief designer of the 2F rocket, the first president of the Aerospace Science and Technology Group, introduced that the control system of the new batch of rockets has applied the departure time deviation correction technology. When the rocket ignition time deviates, it can automatically correct the orbit to complete the orbit entry and rendezvous and docking tasks within a certain range. At the same time, with the further improvement of the telemetry accuracy of the Long 2F rocket and the automation of the launch process operation, the reliability, safety and anti risk capability of the rocket are further improved. At the Jiuquan Satellite Launch Center at the end of November, the lowest temperature was below - 20 ℃. This is the first time that a Chinese spaceship has been launched by a human in the cold conditions at night. In order to "heat" the rocket, the launch site system provides air conditioning support for the rocket to ensure that the rocket is at an appropriate temperature. The rocket system also takes measures such as pasting insulation layers. In the future, China's space station will enter the application and development stage of more than 10 years. In the next few years, the Long 2F rocket will also launch two missions every year, which will play an important role in the operation of China's space station. Highlights 2: For the first time, the six astronauts "joined forces in space" to live in the "Big Three Dwellings" Shenzhou XV manned spacecraft, which is the first manned spacecraft to be welcomed after the "T" basic configuration of the space station is assembled. After the Shenzhou 15 crew entered the space station, China will form a space station assembly structure with six model modules for the first time, and realize the "space rendezvous" of six astronauts and stay in orbit. Ji Qiming, spokesman of the China Manned Space Project and assistant director of the China Manned Space Project Office, said that after the rendezvous and docking, the space station's core module, Tianwen experimental module and Mengtian experimental module will form a "three cabin three ship" combination with the Shenzhou 15 manned spacecraft, Shenzhou XIV manned spacecraft and Tianzhou 5 cargo spacecraft, reaching the largest configuration of the space station at present, with a total weight of nearly 100 tons. "New crew first