Rubber boats used for scientific expedition are seen by the Serling Co (Serling Lake) in Nagqu Prefecture, southwest China's Tibet Autonomous Region, June 19, 2017. Scientists conducted a comprehensive scientific expedition on the Qinghai-Tibet plateau, with one of the three camps located by the Serling Co at an altitude of 4,530 meters. [Photo/Xinhua]

A camp for scientific expedition is established by the Serling Co (Serling Lake) in Nagqu Prefecture, southwest China's Tibet Autonomous Region, June 19, 2017. Scientists conducted a comprehensive scientific expedition on the Qinghai-Tibet plateau, with one of the three camps located by the Serling Co at an altitude of 4,530 meters. [Photo/Xinhua] 

Tents for scientists are set up by the Serling Co (Serling Lake) in Nagqu Prefecture, southwest China's Tibet Autonomous Region, June 19, 2017. Scientists conducted a comprehensive scientific expedition on the Qinghai-Tibet plateau, with one of the three camps located by the Serling Co at an altitude of 4,530 meters. [Photo/Xinhua] 

Tibetan antelopes are seen by the Serling Co (Serling Lake) in Nagqu Prefecture, southwest China's Tibet Autonomous Region, June 19, 2017. Scientists conducted a comprehensive scientific expedition on the Qinghai-Tibet plateau, with one of the three camps located by the Serling Co at an altitude of 4,530 meters. [Photo/Xinhua]