derongxianIntroduction：Introduction to Derong: Derong County is located at 99°07′--99°34′ east longitude and 28°09′--29°10′ north latitude. Located in the southwestern part of Sichuan Province, it belongs to the dry river valley of Jinsha River, the north is connected with Batang and Xiangcheng County of Ganzi Prefecture of Sichuan Province, the southeast is adjacent to Shangri-La County of Diqing Prefecture of Yunnan Province, and the southwest is adjacent to Deqin County of Diqing Prefecture of Yunnan Province. . It is located in the “Aden Nature Reserve” in Daocheng County, Ganzi Prefecture, Sichuan Province, and the “Shangri-La Tourist Area” in Zhongdian County, Yunnan Province.