Swans fly over Sanmenxia Swan Lake Wetland Park in Sanmenxia City, central China's Henan Province, Feb. 8, 2017. Migratory swans came from the Siberia in winter in the Sanmenxia Yellow River wetland. (Xinhua/Feng Dapeng)
Swans fly over Sanmenxia Swan Lake Wetland Park in Sanmenxia City, central China's Henan Province, Feb. 8, 2017. Migratory swans came from the Siberia in winter in the Sanmenxia Yellow River wetland. (Xinhua/Feng Dapeng)
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