【幸运快3_快3app平台_幸运快3app平台】Migratory swans spend winter at central China's wetland

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Swans are seen at a wetland in Sanmenxia City, central China's Henan Province, Nov. 17, 2018. Thousands of migratory swans flied here to spend winter at Sanmenxia Yellow River wetland. (Xinhua/Zhu Xiang)