Duolun Lake is located in the upper reaches of the dry current of the Weihe River and is an artificial reservoir project. The predecessor is the largest water conservancy hub project on Xilin Gol grassland - Xishanwan Reservoir, which is 17 kilometers long on both sides of the lake, in the mountains, sandy land and grassland, along the two sides of the reservoir area and the lake center island, peninsula, sand peninsula and mountains, water, sand, grass and forests are integrated. It is a beautiful and beautiful three-dimensional picture.