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A visitor takes photos of the Sapukonglagabo Mountain in Biru County of Nagqu, southwest China's Tibet Autonomous Region, Aug. 24, 2019. (Xinhua/Huang Huo)

A visitor takes photos of the Sapukonglagabo Mountain in Biru County of Nagqu, southwest China's Tibet Autonomous Region, Aug. 24, 2019. (Xinhua/Huang Huo)