Cocoa Xili National Nature Reserve, located in the northwest of Yushu Tibetan Autonomous Prefecture, Qinghai Province, Kunlun Mountain Nanyu Yangtze River Northyuan Area, bordering the Xinjiang Uygur Autonomous Region, Tibet Autonomous Region, and Qumalai County, Haixi Mongolia Tibetan Autonomous Prefecture and Yushu Prefecture, about 280 kilometers wide from north to south. East and West are 200~400 kilometers long, and the area is 4.5 10,000 square kilometers. The national nature reserve of Coco Xili is mainly to protect rare wildlife and plants such as Tibetan antelopes, wild yaks, Tibetan wild donkeys, Tibetan original alfalfa. On July 7, 2017, at the 41st World Heritage Congress held in Krakow, Poland, Qinghai Cocosili was approved to be included in the World Heritage List by the World Heritage Committee, becoming China's 51st World Heritage Site.