Rehe Hot Spring is located in the northeast of the Lake District of Chengde Mountain Resort. Here is the source of the hot spring, and the clear spring water is poured out from the ground. Therefore, a monument was built next to the spring in 1933, and the word hot river was engraved. In 1979, the hot river spring was officially named. Hot river spring is also the main source of water for the lakes of the summer resort.