Chinese astronauts receive underwater training simulating weightlessness

The Shenzhou-12 flight crew received underwater training simulating weightlessness. A neutral buoyancy tank is an indispensable equipment to simulate weightless environment. Astronauts need a lot of training in the big pool, to learn some skills such as motion coordination, posture control, goods transport and maintenance work under weightlessness. (Photo/VCG)

Source: http://www.ecns.cn/