Members of Chinese surveying team head for the summit of Mt. Qomolangma on May 27, 2020. An eight-member Chinese surveying team set off to reach the summit of Mt. Qomolangma, the world's highest peak, from a mountain camp at an altitude of 8,300 meters at around 2:10 a.m. Wednesday. (Photos: Xinhua)

Members of a Chinese surveying team head for the summit of Mt. Qomolangma on May 27, 2020. An eight-member Chinese surveying team set off to reach the summit of Mt. Qomolangma, the world's highest peak, from a mountain camp at an altitude of 8,300 meters at around 2:10 a.m. Wednesday.

Chinese surveying team sets off to reach the summit of Mt. Qomolangma, the world's highest peak, from a mountain camp at an altitude of 8,300 meters, on May 27, 2020.

Chinese surveying team prepares to set off to reach the summit of Mt. Qomolangma, the world's highest peak, from a mountain camp at an altitude of 8,300 meters, on May 27, 2020.

A member of Chinese surveying team puts on equipment before setting off to reach the summit of Mt. Qomolangma, the world's highest peak, from a mountain camp at an altitude of 8,300 meters, on May 27, 2020.

Chinese surveying team prepares before setting off to reach the summit of Mt. Qomolangma, the world's highest peak, from a mountain camp at an altitude of 8,300 meters, on May 27, 2020.

Photo taken on May 27, 2020 shows a view at the Mount Qomolangma base camp in southwest China's Tibet Autonomous Region. An eight-member Chinese surveying team set off to reach the summit of Mt. Qomolangma, the world's highest peak, from a mountain camp at an altitude of 8,300 meters at around 2:10 a.m. Wednesday.

Wang Yongfeng (R), vice director of the mountaineering administrative center of the General Administration of Sport, speaks to surveying team members at the altitude of 8,300 meters, from the Mount Qomolangma base camp in southwest China's Tibet Autonomous Region, May 27, 2020. An eight-member Chinese surveying team set off to reach the summit of Mt. Qomolangma, the world's highest peak, from a mountain camp at an altitude of 8,300 meters at around 2:10 a.m. Wednesday.

Members of a Chinese surveying team head for the summit of Mt. Qomolangma on May 27, 2020. An eight-member Chinese surveying team set off to reach the summit of Mt. Qomolangma, the world's highest peak, from a mountain camp at an altitude of 8,300 meters at around 2:10 a.m. Wednesday.

Members of a Chinese surveying team head for the summit of Mt. Qomolangma on May 27, 2020. An eight-member Chinese surveying team set off to reach the summit of Mt. Qomolangma, the world's highest peak, from a mountain camp at an altitude of 8,300 meters at around 2:10 a.m. Wednesday.

Members of Chinese surveying team head for the summit of Mt. Qomolangma on May 27, 2020. An eight-member Chinese surveying team set off to reach the summit of Mt. Qomolangma, the world's highest peak, from a mountain camp at an altitude of 8,300 meters at around 2:10 a.m. Wednesday.

Members of a Chinese surveying team head for the summit of Mt. Qomolangma on May 27, 2020. An eight-member Chinese surveying team set off to reach the summit of Mt. Qomolangma, the world's highest peak, from a mountain camp at an altitude of 8,300 meters at around 2:10 a.m. Wednesday.

Members of a Chinese surveying team head for the summit of Mt. Qomolangma on May 27, 2020. An eight-member Chinese surveying team set off to reach the summit of Mt. Qomolangma, the world's highest peak, from a mountain camp at an altitude of 8,300 meters at around 2:10 a.m. Wednesday.

Members of a Chinese surveying team head for the summit of Mt. Qomolangma on May 27, 2020. An eight-member Chinese surveying team set off to reach the summit of Mt. Qomolangma, the world's highest peak, from a mountain camp at an altitude of 8,300 meters at around 2:10 a.m. Wednesday.

Members of a Chinese surveying team head for the summit of Mt. Qomolangma on May 27, 2020. An eight-member Chinese surveying team set off to reach the summit of Mt. Qomolangma, the world's highest peak, from a mountain camp at an altitude of 8,300 meters at around 2:10 a.m. Wednesday.

A member of a Chinese surveying team heads for the summit of Mt. Qomolangma on May 27, 2020. An eight-member Chinese surveying team set off to reach the summit of Mt. Qomolangma, the world's highest peak, from a mountain camp at an altitude of 8,300 meters at around 2:10 a.m. Wednesday.