Dongzhai Port Nature Reserve, also called the Hainan Dongzhai Bay National Nature Reserve, Dongzhai Harbor Mangrove, and Dongzhai Harbor Mangrove Natural Reserve Area, is located within Dongzhai Harbor, in the area of Yanfeng Town, Meilan District, Haikou, Hainan, China. It has an area of 2,500 hectares (6,200 acres) and includes six rivers. The coastline is very irregular and includes a number of bays and tidewater gullies. The mangrove forest on the south coast provides a habitat for birds and other wildlife.