
As frost season arrives, Whooper swans returns to the Rongcheng Swan Lake National Nature Reserve in east China's Shandong Province, marking the start of their wintering journey. (Photo/China News Service)

As frost season arrives, Whooper swans returns to the Rongcheng Swan Lake National Nature Reserve in east China's Shandong Province, marking the start of their wintering journey. (Photo/China News Service)

As frost season arrives, Whooper swans returns to the Rongcheng Swan Lake National Nature Reserve in east China's Shandong Province, marking the start of their wintering journey. (Photo/China News Service)

As frost season arrives, Whooper swans returns to the Rongcheng Swan Lake National Nature Reserve in east China's Shandong Province, marking the start of their wintering journey. (Photo/China News Service)
















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