超过400天！陈冬刷新中国航天员在轨驻留总时长纪录

Core Points - The Shenzhou-20 crew completed a 204-day mission in orbit, marking a significant achievement in China's manned spaceflight capabilities [1][2] - Commander Chen Dong became the first Chinese astronaut to exceed 400 days in total time spent in space and holds the record for the most extravehicular activities by a Chinese astronaut [1][2] Group 1 - The Shenzhou-21 spacecraft successfully landed with astronauts Chen Dong, Chen Zhongrui, and Wang Jie on board [1] - Chen Dong expressed pride in the successful completion of the mission, highlighting the resilience of China's space program [1] - The mission included four extravehicular activities and seven payload operations, contributing to the astronauts' cumulative extravehicular activity count of six for Chen Dong [2] Group 2 - The continuous increase in the duration of astronauts' stays in orbit indicates China's advancements in long-term space habitation technologies, including life support and environmental control systems [2] - The Shenzhou-14 mission, led by Chen Dong, included significant milestones such as the completion of the space station's "T" configuration and the first in-orbit crew transfer [2]