硬核！小鼠航天员选拔vlog来了

Core Points - The Shenzhou 21 mission is set to launch, with four mice accompanying astronauts for experiments in space [1] - The mice underwent rigorous training and assessments to qualify for the mission, highlighting the challenges faced [1] Group 1 - The Shenzhou 21 mission will involve the participation of four mice, referred to as "space mice," to assist astronauts in conducting experiments [1] - The training and evaluation process for the mice was described as "hardcore," indicating a high level of preparation required for the mission [1] - Public reaction includes comments on the difficulty of the training process, emphasizing the challenges faced by the mice [1]