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A bird is seen on a lake of Ruoergai National Wetland Park in Aba Tibetan and Qiang Autonomous Prefecture, southwest China's Sichuan Province, Oct. 27, 2017. (Xinhua/Zhang Fan)
A bird is seen on a lake of Ruoergai National Wetland Park in Aba Tibetan and Qiang Autonomous Prefecture, southwest China's Sichuan Province, Oct. 27, 2017. (Xinhua/Zhang Fan)