The Nansi Lake Nature Reserve was established in 1982 and is located in Shandong province, specifically in Weishan county, Rencheng district, and Yutai county within Jining city. It encompasses a diverse natural complex consisting of lake wetlands, islands, adjacent paddy fields, and surrounding mountain forests, forming a rich and interconnected ecosystem.
Covering a total area of 127,547 hectares, the main objective of the reserve is to protect bird species and their habitats, which are vital for their survival.