In May, the Tibetan antelopes, known as "elves on the plateau", started their migrate season, when they would travel long distances from their traditional habitats to the Zhuonai Lake in the hinterland of Hoh Xil at an altitude of 4,800 meters to give birth. At this time, the Ecological Environment and Natural Resources Management Bureau of Qumalai Administration Office of Sanjiangyan National Park organized ecological rangers to escort them. It is reported that the antelopes would come back before August.