Longpo Naval Base

Longpo Naval Base (Chinese: 龍坡海軍基地) is a naval base for nuclear submarines along the southern coast of Hainan Island, China. This underground base has been reported by several intelligence agencies, especially Indian agencies. The images collected by the Federation of American Scientists (FAS) in February 2008 shows that China constructed a large scale underground base for its naval forces. In August 2020, satellite imagery from Planet Labs appeared to show a Shang-class submarine entering the underground base.