Redshanks are seen at the Lhalu wetland national nature reserve in Lhasa, southwest China`s Tibet Autonomous Region, July 17, 2021. (Xinhua/Zhang Rufeng)

A child visits the Lhalu wetland national nature reserve in Lhasa, southwest China`s Tibet Autonomous Region, July 17, 2021. (Xinhua/Zhang Rufeng)

The Potala Palace is seen near the Lhalu wetland national nature reserve in Lhasa, southwest China`s Tibet Autonomous Region, July 17, 2021. (Xinhua/Zhang Rufeng)

An egret flies at the Lhalu wetland national nature reserve in Lhasa, southwest China`s Tibet Autonomous Region, July 17, 2021. (Xinhua/Zhang Rufeng)

A bird is seen at the Lhalu wetland national nature reserve in Lhasa, southwest China`s Tibet Autonomous Region, July 17, 2021. (Xinhua/Zhang Rufeng)