Introduction to Xiaoheijiang: Between the lofty mountains and ridges, the surging water of Xiaoheijiang rushes away carrying sand, earth and rocks, like a silky ribbon, floating in the mountains. There are large expanses of primeval forest and subtropical broad-leaved forest growing on the river bank. The forest is as deep as the sea, and wild animals and plants are hidden in it. There are macaques, slow lorises, Philip's langurs, peacocks, as well as bamboo forests, big banyan trees, dragon blood trees, Tree ferns, etc., gather together to form a paradise of animals and plants and a precious natural gene bank. The part of Xiaoheijiang that flows through Pu'er County is 35 kilometers long, with a maximum water surface width of 87.3 meters, a minimum water surface width of 71.4 meters, an average water surface width of 80.67 meters, a maximum water depth of 6 meters, and an average water depth of 2.33 meters, and finally merges into Lancang River.