An athlete is training in the 'Water Cube.'

(BEIJING, Jan. 28) -- As the competition venue for the Olympics, it is essential for the National Aquatics Center to meet different needs during the Games. Furthermore, the "Water Cube" should provide a comfortable environment for both athletes and spectators.

In the Water Cube, the temperature of the water is kept at 27 degrees Celsius, which is comfortable for athletes. The temperature in the spectator stands is around 18 to 20 degree, and the humidity is at 50% to 60%. The environment is ideal for fans to enjoy the games.

Aside from comfortable temperatures, the design of the floor is also people-friendly. Since there is a distance from the competition pool to the warm-up pool, the athletes have to go back and forth between them barefoot. Therefore, special floor tiles were used. Walking on this kind of floor, the athletes will not feel cold, just comfortable.