This photo taken on Dec. 8, 2023 shows black-necked cranes flying near snow-covered mountains in Lhasa, southwest China's Xizang Autonomous Region. (Xinhua/Jigme Dorje)

This photo taken on Dec. 8, 2023 shows black-necked cranes flying past snow-covered mountains in Lhasa, southwest China's Xizang Autonomous Region. (Xinhua/Jiang Fan)

This aerial photo taken on Dec. 8, 2023 shows snow scenery in Lhunzhub County of Lhasa, southwest China's Xizang Autonomous Region. (Xinhua/Jigme Dorje)

This photo taken on Dec. 8, 2023 shows the Potala Palace after snow in Lhasa, southwest China's Xizang Autonomous Region. (Xinhua/Jiang Fan)

This photo taken on Dec. 8, 2023 shows black-necked cranes flying past snow-covered mountains in Lhasa, southwest China's Xizang Autonomous Region. (Photo by Tenzin Nyida/Xinhua)

This photo taken on Dec. 8, 2023 shows black-necked cranes flying past snow-covered mountains in Lhasa, southwest China's Xizang Autonomous Region. (Xinhua/Jigme Dorje)

This photo taken on Dec. 8, 2023 shows black-necked cranes flying past snow-covered mountains in Lhasa, southwest China's Xizang Autonomous Region. (Xinhua/Jiang Fan)