Tourists take a walk by the lake at the foot of the Sapukonglagabo Mountain in Biru County of Nagqu, southwest China's Tibet Autonomous Region, Aug. 16, 2023. (Xinhua/Jiang Fan)

This photo taken on Aug. 16, 2023 shows a view of the Sapukonglagabo Mountain in Biru County of Nagqu, southwest China's Tibet Autonomous Region. (Xinhua/Jiang Fan)

This photo taken on Aug. 16, 2023 shows a view of the Sapukonglagabo Mountain in Biru County of Nagqu, southwest China's Tibet Autonomous Region. (Xinhua/Jiang Fan)

Tourists enjoy the lake scenery at the foot of the Sapukonglagabo Mountain in Biru County of Nagqu, southwest China's Tibet Autonomous Region, Aug. 16, 2023. (Xinhua/Jiang Fan)

Tourists take a walk by the lake at the foot of the Sapukonglagabo Mountain in Biru County of Nagqu, southwest China's Tibet Autonomous Region, Aug. 16, 2023. (Xinhua/Jiang Fan)

This photo taken on Aug. 16, 2023 shows a view of the Sapukonglagabo Mountain in Biru County of Nagqu, southwest China's Tibet Autonomous Region. (Xinhua/Jiang Fan)

This photo taken on Aug. 16, 2023 shows a view of the Sapukonglagabo Mountain in Biru County of Nagqu, southwest China's Tibet Autonomous Region. (Xinhua/Jiang Fan)