China’s first astronaut cave training exercise recently concluded successfully in Wulong District, Chongqing, with 28 astronauts participating. The nearly month-long cave training program, organized and implemented by the China Astronaut Research and Training Center, included more than ten training modules, such as environmental monitoring, cave surveying, simulated ground-to-space communication, and team psychological and behavioral training. It is reported that the astronauts were divided into four groups, taking turns to stay for six days and five nights in a natural cave with an average temperature of 8 degrees Celsius and humidity as high as 99%. (Xinhua News Agency)