HOH Xil Nature Reserve,“Hoh Xil” meaning ‘beautiful girl’ in Mongolian, is located in the hinterland of the Qinghai-Tibet Plateau. Because of its harsh natural environment, no people live here. Therefore it’s also known as the “forbidden zone for humans” or “mysterious land.” It is one of the regions on earth that humans have little knowledge of, thus preserving it as an untouched natural paradise. Located in the northeastern corner of the Qinghai- Tibet Plateau, Hoh Xil Nature Reserve covers a large area of mountains and grassland at an altitude of more than 4,500 meters above sea level.