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A swan is seen in the wetland near the Yellow River in Pinglu County, north China's Shanxi Province, Dec. 27, 2017. Every winter, wild swans migrate here from Siberia. (Xinhua/Yang Chenguang)
A swan is seen in the wetland near the Yellow River in Pinglu County, north China's Shanxi Province, Dec. 27, 2017. Every winter, wild swans migrate here from Siberia. (Xinhua/Yang Chenguang)