Photo taken on Jan. 15, 2021 shows the scenery of Purog Kangri Glacier, the third largest glacier in the world, in Shuanghu County, Nagqu, Southwest China's Tibet Autonomous Region.

Photo taken on Jan. 15, 2021 with cellphone shows the scenery of Purog Kangri Glacier, the third largest glacier in the world, in Shuanghu County, Nagqu, Southwest China's Tibet Autonomous Region.

Photo taken on Jan. 15, 2021 with cellphone shows the scenery of Purog Kangri Glacier, the third largest glacier in the world, in Shuanghu County, Nagqu, Southwest China's Tibet Autonomous Region.

Photo taken on Jan. 15, 2021 with cellphone shows the scenery of Purog Kangri Glacier, the third largest glacier in the world, in Shuanghu County, Nagqu, Southwest China's Tibet Autonomous Region.

Photo taken on Jan. 15, 2021 with cellphone shows the scenery of Purog Kangri Glacier, the third largest glacier in the world, in Shuanghu County, Nagqu, Southwest China's Tibet Autonomous Region.

Photo taken on Jan. 15, 2021 with cellphone shows the scenery of Purog Kangri Glacier, the third largest glacier in the world, in Shuanghu County, Nagqu, Southwest China's Tibet Autonomous Region.

Photo taken on Jan. 15, 2021 with cellphone shows the scenery of Purog Kangri Glacier, the third largest glacier in the world, in Shuanghu County, Nagqu, Southwest China's Tibet Autonomous Region.