Chenggong Dounan Wetland is located on the east bank of Dianchi Lake on the side of the lake, and the north is connected to Guandu Wangguan Wetland, covering an area of 650 mu. In the wetland construction, the breakwaters that blocked the flow of water were removed through three landscaping methods, and the land-wetland-Dianchi ecosystem was reconnected. At the same time, the effluent from the upstream sewage treatment plant was used as the water source for the wetland system. While rationally utilizing the current conditions, the water bodies in this area are purified by means of ecological methods.