Terns fly over Lhasa River of Lhasa, southwest China's Tibet Autonomous Region, June 26, 2022. (Xinhua/Zhang Rufeng)

A brown-headed gull hovers over Lhasa River of Lhasa, southwest China's Tibet Autonomous Region, June 26, 2022. (Xinhua/Zhang Rufeng)

Brown-headed gulls perch near water of Lhasa River in Lhasa, southwest China's Tibet Autonomous Region, June 26, 2022. (Xinhua/Zhang Rufeng)

A white wagtail perches on a stone in Lhasa River of Lhasa, southwest China's Tibet Autonomous Region, June 26, 2022. (Xinhua/Zhang Rufeng)