Located in the west of Liuhaoying Village, Kangzhuang Town, Yanqing District, it belongs to the transition zone from North China Plain to Shanxi Plateau and Inner Mongolia Plateau. It is the largest wetland nature reserve in Beijing and the only wetland bird nature reserve. It has many wetland types, such as reservoirs, rivers and marshes. It has the first-class and second-class protected animals of the state. It has beautiful scenery and does not need to travel.