Cangshan Erhai Lake, an AA tourist attraction in Dali, Yunnan Province, is a rare and internationally famous comprehensive reserve integrating natural landscape, geological landform, biological resources and human history. The main protected objects of Erhai Lake are the plateau Tanshui Lake and aquatic animals and plants, the natural landscape of the north-south animal and plant transition zone, and the glacial relics, which are rich in cultural and historical relics and tourism resources