The Yancheng Wetland Nature Reserve is located in Jiangsu Province, China. It covers an area of approximately 453 square kilometers and is known for its diverse ecosystems, including mudflats, marshes, and coastal wetlands. The reserve plays a crucial role in supporting various species of birds, particularly migratory ones, making it an important site for birdwatching and conservation. Established in 1992, the reserve is part of the Yellow Sea Ecological Region and is recognized as a UNESCO World Heritage Site. It serves as a habitat for endangered species, such as the Spoon-billed Sandpiper, and contributes to the protection of biodiversity in the region.