White swans swim in Yellow River wetland in Pinglu county, Shanxi province. As the weather is getting warmer, white swans which spend their winter in Pinglu county begin to fly back to Siberia. The Yellow River wetland in Pinglu county is one of the places where domestic swans spend winter, with more than 10,000 swans flocking there for rest in winter. [Photo/sxrb.com]

White swans swim in Yellow River wetland, Pinglu county, Shanxi province. [Photo/sxrb.com]