The overhead window at the ridge of the building was designed for natural lighting and ventilation.

During the competitions, the curtain can be pulled over to keep the sunlight out since it could affect them, but when they are over, the curtain can be pulled back to let in natural light, brightening the atmosphere inside the venue and reducing the use of power light.

Since most swimming pools have problems in dealing with their water vapor, the skylight can be opened to let out the stagnant hot air in spring, summer and autumn.

"Our design allows the competition hall to open its eyes to the daylight and breathe the fresh air from outside," one designer said poetically.