Core Points - The Shenzhou 20 mission is preparing for the return of three astronauts, with a focus on the air rescue and recovery team that has been training for over 20 days at the Dongfeng landing site [1][3]. Group 1: Training and Preparation - The air rescue team conducted a full-system rehearsal, deploying five helicopters to the designated airspace for the mission [3]. - The helicopters are arranged in a square formation with a side length of approximately 26 kilometers, centered around the expected landing point of the capsule [5]. - The team has completed seven individual training sessions and five joint exercises since arriving at the landing site last month [7]. Group 2: Challenges and Adaptations - The eastern area of the Dongfeng landing site presents more complex terrain compared to the western area, which has influenced the training methods, including night-time drop training [9]. - The presence of dust in the area poses risks to helicopter operations, prompting the team to conduct thorough inspections of the engines after each flight [11]. Group 3: Team Composition and Experience - The air rescue team is composed of highly experienced pilots, with each helicopter featuring a dual-command system, ensuring that each aircraft is operated by a senior and a first-class pilot [13]. - The team has expressed confidence in their ability to successfully complete the recovery mission, citing stable personnel morale and well-maintained equipment [15].