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Photo taken on Nov. 14, 2019 shows white swans at a wetland in Sanmenxia, central China's Henan Province. White swans have flown from Siberia to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Hao Yuan)
Photo taken on Nov. 14, 2019 shows white swans at a wetland in Sanmenxia, central China's Henan Province. White swans have flown from Siberia to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Hao Yuan)