Introduction to Dayan Lake: It has an area of ​​500,000 square meters, an average water depth of 4 meters, and a total water volume of 400,000 cubic meters (in addition to satisfying the irrigation needs of 10,000 acres of ecological forest and urban green space). In 2009, the capacity will be expanded to 3 million cubic meters. , for people to swim, boat, fish, etc.