Hot spring introduction: The Dongli Lake area is rich in geothermal resources and is the center of the geothermal zone in North China. There are three geothermal wells in the area. The highest water temperature in one is 100°C. The water quality contains metasilicic acid, lithium, strontium and other trace elements. It has been recognized as the "Hometown of Hot Spring in China" by the China Mining Federation.