Songtao reservoir

The Songtao Reservoir, also known as the Songtao Reservoir Irrigation Area, is the largest body of water in Hainan, and the second largest reservoir in China.Located upstream of the Nandu River approximately 20 kilometres southeast of Danzhou City, the reservoir covers 0.17 percent of the island and has a total capacity of 3,340,000,000 cubic metres. The reservoir contains more than 100 islands, and is used for agriculture, fisheries, and tourism.

Source: Wikipedia