Photo taken on Feb. 24, 2020 shows a view at Lhalu wetland in Lhasa, southwest China's Tibet Autonomous Region. Lhalu Wetland National Nature Reserve, known as "the Lung of Lhasa", gets rejuvenated as temperature rises. (Photos: Xinhua)

Water birds fly above the water at Lhalu wetland in Lhasa, southwest China's Tibet Autonomous Region, Feb. 24, 2020. Lhalu Wetland National Nature Reserve, known as "the Lung of Lhasa", gets rejuvenated as temperature rises.

Birds are seen at Lhalu wetland in Lhasa, southwest China's Tibet Autonomous Region, Feb. 24, 2020. Lhalu Wetland National Nature Reserve, known as "the Lung of Lhasa", gets rejuvenated as temperature rises.

Bar-headed geese are seen at Lhalu wetland in Lhasa, southwest China's Tibet Autonomous Region, Feb. 24, 2020. Lhalu Wetland National Nature Reserve, known as "the Lung of Lhasa", gets rejuvenated as temperature rises.