Group 1 - The core point of the article highlights the achievement of China's space program, specifically the milestone of the first "space rendezvous" three years ago, which has since been followed by seven successful rendezvous events [1][4][6]. Group 2 - The article reflects on the progress of China's manned space missions, noting the successful gathering of crew members from different missions at the Chinese space station [1][4]. - It emphasizes the ongoing developments and future expectations for China's space exploration efforts, indicating a commitment to continued advancements in this field [1].

Group 1 - The Shenzhou-20 mission marks China's sixth successful space rendezvous, showcasing advancements in space technology and operations [3] - The mission involves a crew of six astronauts who will work and live in the space station for approximately five days [8] - The Shenzhou-20 crew has completed multiple extravehicular activities (EVAs), with the latest being the installation of protective devices and equipment inspections [4][6] Group 2 - The Shenzhou-20 mission is characterized by its efficient docking process, taking about 6.5 hours to complete [4] - This mission is notable for being the first to have two command leaders from the Shenzhou-20 crew performing joint extravehicular tasks [6] - The astronauts have successfully completed a total of six EVAs, making them the most active Chinese astronauts in terms of extravehicular missions [5]

Core Points - The successful autonomous rapid rendezvous and docking of the Shenzhou 21 crew with the space station marks a significant achievement in China's space exploration history, being the 7th "space reunion" [2] - The two crew commanders reunited in the "Tiangong" space station three years after their first meeting, symbolizing continued collaboration in China's manned space missions [4] - The two crews will conduct an in-orbit rotation, working and living together in the space station for approximately five days to complete various planned tasks [6]

Group 1 - The Shenzhou 21 mission is ready for launch after a comprehensive system rehearsal at the Jiuquan Satellite Launch Center, which included checks on the launch tower, rocket, spacecraft, and other subsystems [1] - This rehearsal is noted as the most extensive and realistic pre-launch exercise, simulating the entire process from flight preparation to rocket separation [1] - The Shenzhou 21 vehicle has undergone multiple checks since its vertical transport to the launch area, ensuring all systems are functioning correctly and meeting launch requirements [1] Group 2 - The Shenzhou 20 crew, having been in orbit for over 180 days, is preparing for their return and the upcoming "space rendezvous" [2] - Ground teams are conducting search and recovery drills in anticipation of the Shenzhou 20's return [2]