Hainan Island is the largest island in China.

Hainan Island is the 42nd largest island in the world and the second largest island in China. The land area is about 35,400 square kilometers, and the sea area is about 20,000 square kilometers.

Hainan Island is located in the south of Guangdong Province. The land plane of Hainan Island is a Sydney-shaped ellipse with its long axis running northeast-southwest and covering an area of more than 30,000 square kilometers. It is the second largest island in China. The coastline of Hainan Island is arc-shaped, about 1823 km long. There are 68 ports available for construction along the coast, among which the alternative ports for building deep-water ports are relatively scattered. Haikou Port, Sanya Port, Yangpu Port, Basuo Port and Qinglan Port have been built.