On southern shore of Ange Island, there was a special astronaut training center. The 700-acre site occupied a jagged cliff at the southern tip of Ange Island. One-third of the facilities were on the surface, while two-thirds of the facilities were located in the sea.
The graphene compartment enclosed a 400-acre sink in the sea. The seawater in the tank wasn't exchanged with external seawater and was partitioned into two blocks by the graphene barrier. By changing the salinity of the salt water in the district, the buoyancy of seawater could be compensated by gravity to simulate a weightless environment in space and the low-gravity environment on the moon's surface.
Underwater facilities included simulated space stations, space living areas, experimental cabins, and core cabins. The training program covered a total of 437 space activities ranging from spacewalking to core cabin work to operating a workboat to complete the recovery of space debris.
