Introduction to Yusun River: Yusun River is located at a vertical depth of 15 meters in Yuzhu Cave. The total length of the river is more than 800 meters. The river surface is as level as a mirror and as clear as a bottom. The rare fish species "transparent fish" swims in it. , rare in the world. Rafting in the river is like entering a fairyland in a painting, which makes people forget to leave.