Core Points - The Shenzhou 20 and 21 astronaut crews are set to complete an in-orbit rotation, with the Shenzhou 20 crew preparing for their return to the Dongfeng landing site [1] - A comprehensive final system drill was conducted on November 2 to ensure readiness for the astronauts' return [1][18] Group 1: Search and Recovery Operations - Over a hundred vehicles, including search and communication vehicles, were mobilized to standby points for the recovery operation [3] - Five helicopters from the aerial recovery team were deployed to the landing area following the announcement of the return capsule's coordinates [5] - The aerial team enhanced night search training and developed specific flight methods to improve target identification in challenging conditions [7] Group 2: Medical and Safety Preparations - The Shenzhou medical rescue team has conducted systematic drills focusing on medical treatment under extreme conditions [12] - The team leader emphasized the importance of familiarizing with rescue processes and updating emergency equipment to ensure efficient medical response [14] - Ground teams have improved night-time navigation and communication equipment, adding new lighting drones and emergency lights to enhance operational effectiveness [16] Group 3: Overall Mission Readiness - The final drill was meticulously planned and executed, simulating the actual recovery mission to identify potential risks [18] - All participating systems demonstrated high morale and readiness, with confidence in successfully executing the recovery mission [18][20] - The exercise involved close coordination among over ten search and rescue teams, ensuring a comprehensive rehearsal of the recovery process [20]

Core Viewpoint - The Shenzhou 20 astronaut crew successfully completed China's 7th space rendezvous with the Shenzhou 21 crew, marking a significant milestone in China's space exploration efforts. The astronauts will live together in the space station for approximately five days to complete various tasks. Group 1: Challenges of Nighttime Search - Nighttime search operations present extreme challenges due to the lack of visual references in the vast Gobi Desert, complex terrain, and equipment performance degradation in low-temperature environments [2] - The Jiuquan Satellite Launch Center has conducted multiple rounds of specialized nighttime training to prepare for these challenges, focusing on aerial search flight and infrared thermal imaging operations [2] Group 2: Rapid Location of Return Capsule - The aerial team utilizes optical pods with infrared thermal imaging capabilities to accurately locate the return capsule, even when it is difficult to see [3] - Upgrades to the nighttime lighting system for drones have been implemented to provide extensive illumination for rescue teams, optimizing lighting angles to minimize visual interference [3] Group 3: Astronauts' Cold Protection Post-Landing - Medical personnel have prepared cold protection supplies, including sleeping bags and blankets, for the astronauts, ensuring they receive immediate care in a warm environment after landing [3][4] - The rescue team has enhanced training for cold weather operations and optimized rescue processes to ensure effective medical support and thermal protection for astronauts post-landing [4]