Introduction to river wetlands: As the second largest inland river in Zhejiang Province, Oujiang River is respected as the "Mother River" by the people in Lishui area. Among the Lishui wetland resources, 82.12% of the river wetland area belongs to the Oujiang River system. Other wetland types, such as estuary waters, deltas, water storage areas, swamp wetlands, and floodplains, also mostly originate from the Oujiang River system. The Oujiang River has become It is a unique carrier of wetland resources in Lishui City. With the Oujiang River as the center, Lishui is crisscrossed by rivers and has derived a wide range of wetland types, such as estuary waters, riverbanks, floodplains, reservoir tailings areas, waterfront marshes, farmland, and major flood discharge and detention areas. Lishui's good wetland ecological environment has nurtured a rich diversity of biological resources, including a total of 116 species of aquatic vascular plants from 40 families, 73 genera, and many rare and endangered species. Among the only wild plants listed in the first-level national protection are Chinese water leek, Oriental water leek, There are three species of water leek and long-beaked buttercup Alisma; there are also many rare and endangered wetland animal species, such as mollusk, giant salamander, otter, flower eel, sweetfish, tiger frog, Chongan mustache toad, etc. The wetland is also a wintering ground for a large number of waterfowl and a transit point for the migration of rare migratory birds, which has obvious regional advantages.