Swans fly over a wetland in Sanmenxia, central China's Henan Province, Nov. 22, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Hao Yuan) Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 22, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Wang Ding) A swan flies over a wetland in Sanmenxia, central China's Henan Province, Nov. 23, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Wang Ding) Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 23, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Wang Ding) A swan is seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 23, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Wang Ding) Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 22, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Hao Yuan) Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 22, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Hao Yuan) Swans fly over a wetland in Sanmenxia, central China's Henan Province, Nov. 23, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Hao Yuan) Swans fly over a wetland in Sanmenxia, central China's Henan Province, Nov. 22, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Wang Ding) Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 23, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Wang Ding) Swans fly over a wetland in Sanmenxia, central China's Henan Province, Nov. 22, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Wang Ding) Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 22, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Wang Ding) Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 23, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Hao Yuan) Swans fly over a wetland in Sanmenxia, central China's Henan Province, Nov. 23, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Wang Ding) Swans fly over a wetland in Sanmenxia, central China's Henan Province, Nov. 23, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Wang Ding) Swans are seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 22, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Hao Yuan) A swan is seen at a wetland in Sanmenxia, central China's Henan Province, Nov. 23, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Hao Yuan) Swans fly over a wetland in Sanmenxia, central China's Henan Province, Nov. 23, 2022. A large number of migratory swans flied to the Yellow River wetland in Sanmenxia to spend winter. (Xinhua/Wang Ding)
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