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Swans fly over the downtown area 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)
Migratory swans spend winter at central China's wetland
Source: Xinhua| 2018-11-18 07:21:06|Editor: Yang Yi
