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Migratory birds are seen at the Zongjiaolukang Park in Lhasa, capital of southwest China's Tibet Autonomous Region, Dec. 1, 2017. (Xinhua/Purbu Zhaxi)
Migratory birds are seen at the Zongjiaolukang Park in Lhasa, capital of southwest China's Tibet Autonomous Region, Dec. 1, 2017. (Xinhua/Purbu Zhaxi)