
Chinese surveyors rest at the advance camp at an altitude of 6,500 meters at Mount Qomolangma in southwest China's Tibet Autonomous Region on May 7, 2020. (Photo by Zhaxi Cering/Xinhua)

Chinese surveyors rest at the advance camp at an altitude of 6,500 meters at Mount Qomolangma in southwest China's Tibet Autonomous Region on May 7, 2020. (Photo by Zhaxi Cering/Xinhua)