Photo taken on Aug. 20, 2020 shows the Sapukonglagabo Mountain in Biru County of Nagqu, southwest China's Tibet Autonomous Region. (Xinhua/Chogo)

Photo taken on Aug. 20, 2020 shows the Sapukonglagabo Mountain in Biru County of Nagqu, southwest China's Tibet Autonomous Region. (Xinhua/Chogo)

Photo taken on Aug. 20, 2020 shows the Sapukonglagabo Mountain in Biru County of Nagqu, southwest China's Tibet Autonomous Region. (Xinhua/Chogo)

Photo taken on Aug. 20, 2020 shows the Sapukonglagabo Mountain in Biru County of Nagqu, southwest China's Tibet Autonomous Region. (Xinhua/Chogo)

Photo taken on Aug. 20, 2020 shows the Sapukonglagabo Mountain in Biru County of Nagqu, southwest China's Tibet Autonomous Region. (Xinhua/Chogo)

Photo taken on Aug. 20, 2020 shows the Sapukonglagabo Mountain in Biru County of Nagqu, southwest China's Tibet Autonomous Region. (Xinhua/Chogo)