Bacha Island Introduction: Bacha Island National Nature Reserve is an inland wetland water ecosystem type nature reserve. It consists of several islands such as Heixiazi Island, Men and Women Island, and some waters of Heilongjiang and the Triangular Bay. It was established in October 1999, with a core area of ​​7,918 hectares, a buffer area of ​​6,450 hectares, an experimental area of ​​16,553 hectares, and a protection zone of 1,093 hectares.