According to the China Manned Space Engineering Office, at 00:55 on December 27, after about 6 hours, the Shenzhou 13 crew successfully completed all the established tasks for the second spaceflight. Astronaut Zhai Zhigang and astronaut Ye Guangfu returned to the Tianhe core module safely, and the spaceflight activities were a complete success. This is the fourth time for Chinese astronauts to leave the space station. During the extravehicular activities, it successively completed the tasks of panoramic camera C lifting, extravehicular operation point foot limiter installation, related work efficiency verification and object transfer verification. At the same time, it further verified the functional performance of the core module airlock module, extravehicular service and mechanical arm, and further assessed the technology related to extravehicular activities, the cooperation of astronauts inside and outside the module and the cooperation ability of heaven and earth, It has further accumulated experience for subsequent outbound activities. In the follow-up, the Shenzhou 13 astronaut crew will put into the next stage of on orbit work tasks to welcome the new year in a "feel good" state. This will also be the first time for Chinese astronauts to cross the new year in space. (Xinhua News Agency)