View of Lhalu wetland in Lhasa, Tibet

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A bird perches on a branch at the Lhalu wetland in Lhasa, southwest China`s Tibet Autonomous Region, April 6, 2020. (Xinhua/Zhang Rufeng)

View of Lhalu wetland in Lhasa, Tibet

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Birds are seen at the Lhalu wetland in Lhasa, southwest China`s Tibet Autonomous Region, April 6, 2020. (Xinhua/Zhang Rufeng)

View of Lhalu wetland in Lhasa, Tibet

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Photo taken on April 6, 2020 shows a cormorant at the Lhalu wetland in Lhasa, southwest China`s Tibet Autonomous Region. (Xinhua/Zhang Rufeng)

View of Lhalu wetland in Lhasa, Tibet

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Photo taken on April 6, 2020 shows a view of the Lhalu wetland in Lhasa, southwest China`s Tibet Autonomous Region. (Xinhua/Zhang Rufeng)

View of Lhalu wetland in Lhasa, Tibet

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Photo taken on April 6, 2020 shows a view of the Lhalu wetland in Lhasa, southwest China`s Tibet Autonomous Region. (Xinhua/Zhang Rufeng)

View of Lhalu wetland in Lhasa, Tibet

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Birds are seen at the Lhalu wetland in Lhasa, southwest China`s Tibet Autonomous Region, April 6, 2020. (Xinhua/Zhang Rufeng)

View of Lhalu wetland in Lhasa, Tibet

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Birds are seen at the Lhalu wetland in Lhasa, southwest China`s Tibet Autonomous Region, April 6, 2020. (Xinhua/Zhang Rufeng)