Share the QR code < / P > < p > with wechat scanning code to friends and circles of friends < / P > < p > Beijing daily client < / P > < p > < p > reporter: Zhang hang < / P > < p > at the afternoon press conference, Lin Xiqiang, deputy director of China Manned Space Engineering Office, said that Shenzhou 12 was launched into orbit on June 17 this year. During the mission, the astronaut crew established the working and living environment of the space station, managed and cared for the space station, carried out two out of cabin activities, carried out space science experiments and technology experiments, conducted space science education interaction, completed a three-month on orbit stay, and returned to the ground safely on September 17, The functional performance of each system of the project in executing the space station mission has been checked and verified, the process is smooth, the result is satisfactory, and the established goal of the mission has been successfully achieved < p > < / P > < p > Lin Xiqiang said that the Shenzhou 12 mission created many "firsts": first, Chinese astronauts entered the Chinese space station for the first time; Second, it is the first time to realize the long-term presence of astronauts for three months; Third, the manned autonomous rapid rendezvous and docking was realized for the first time, and the rendezvous and docking time was shortened from 2 days to 6.5 hours; Fourth, the astronauts carried out extravehicular operation with mechanical arm for the first time; Fifth, the regenerative environmental control and life insurance technology was comprehensively and systematically verified on orbit for the first time; Sixth, the dynamic management of on orbit materials is realized for the first time; Seventh, three aircraft combinations were flown for the first time; Eighth, for the first time, manned spacecraft and manned rocket emergency rescue standby were implemented at the launch site, and the "rolling backup" strategy was verified; Ninth, the Dongfeng landing site carried out the astronaut search, rescue and recovery mission for the first time; Tenth, the six support centers, including the operation planning center, the astronaut support center and the spacecraft on orbit support center, have realized the "centralized + distributed" flight control support mode under the condition of long-term manned for the first time < p > through the implementation of the mission, the astronaut crew and all systems of the project have gained valuable experience, which has laid a solid foundation for the construction and operation of the space station. During the whole mission, the Shenzhou 12 astronaut crew performed well and deserved to be the representative of countless fighters and climbers in China's aerospace industry in the new era < p > Lin Xiqiang said that the recovery of astronauts after returning to the ground in the space station stage can be divided into three stages: isolation recovery, convalescence recovery and recovery observation. On September 17, the Shenzhou 12 astronauts returned to Beijing Aerospace City on the day of their return. At present, the isolation and recovery stage has been completed as planned. The three astronauts are in good physical and mental condition and will be transferred to the convalescence and recovery stage