Wushan Zhangjiawan is playing at No.286, Jingtan Second Road, Gaotang Street, Wushan County, Chongqing. Guanjiaxi Reservoir is located in Zhangjiawan, the core area of Wushan County. This is a small reservoir that was once abandoned. In recent years, through dredging, planting aquatic plants to purify water, building walkways and bicycle lanes around the lake, the reservoir has been built into an ecological landscape lake integrating leisure, fitness and hydrophilicity.