Weishan Lake is a broken depression lake located in the south of Weishan County, Jining City, 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 have the largest area of Weishan Lake, reaching 660 square kilometers, and the water depth is about 3 meters. The Beijing-Hangzhou Grand Canal passes by the lake. The surface of Weishan Lake is mainly managed by Weishan County, Jining City, Shandong Province, and the right to use the lake Xitan (wetland) is owned by Jiangsu, of which Peixian has a surface area of about 400 square kilometers (including some surface area of Zhaoyang Lake), and the lake shoreline is 62 kilometers long; Xuzhou Tongshan District jurisdiction Weishan Lake Lake area surface area of about 100 square kilometers, lake shore line length 60 kilometers.