Core Points - The Shenzhou-20 manned spacecraft is set to return to Earth, with the Dongfeng landing site completing its final comprehensive drill for nighttime search and rescue operations [1] - This mission marks the third time a nighttime low-temperature environment task has been executed, following Shenzhou-14 and Shenzhou-18 [1] - The Dongfeng landing site has developed a "space-ground integrated, three-dimensional collaborative" multi-dimensional search and rescue system to enhance operational efficiency [1] Group 1 - The nighttime search and rescue operation faces challenges such as low visibility and complex terrain, which were addressed through comprehensive drills [1] - The exercise tested the capabilities to locate and handle the return capsule under challenging conditions, while enhancing command coordination and communication [1] - Three tethered drones equipped with high-power LED lights were deployed to provide adequate illumination for operations, covering a radius of approximately 300 meters [1] Group 2 - To ensure astronauts maintain normal body temperature after exiting the capsule, the Dongfeng landing site modified three medical monitoring vehicles to stabilize internal temperatures around 25 degrees Celsius [2] - Ground teams have conducted thorough reconnaissance of the landing area, establishing multiple emergency routes and upgrading vehicle lighting systems for nighttime operations [2] - Since the initiation of the Shenzhou-20 return mission, various search and rescue teams have undergone targeted training, including static and dynamic tests, as well as desert terrain driving [2]

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