Weishan Lake is a broken depression lake in the south of Weishan County, Shandong Province, China. The north is connected to Zhaoyang Lake, Dushan Lake and Nanyang Lake. The waterway is communicated, and the four lakes are collectively called the South Four Lakes. The four lakes are the largest in the area of Weishan Lake, reaching 660 square kilometers, and the water depth is about 3 meters.[1][2] The Beijing-Hangzhou Grand Canal passes by the lake.