The difference between the underwater world in the North Sea and the window of the ocean is to show the key points and scenic spots.

Beihai Underwater World is a large aquarium with the theme of marine life and integrating viewing, tourism and popular science education. It shows 23 scenic spots, such as underwater garden and underwater lost city. The window of the ocean is a modern comprehensive exhibition hall, which displays marine culture through sixteen themes, including mysterious sea, ancient sea, just tour and coral sea. It includes Zheng He's voyages to the West, geographical discoveries and other scenic spots.