Swans frolic in a wetland park of Neiqiu county, Xingtai city, Hebei Province. As temperature drops, groups of migratory birds have arrived at Xingtai to spend winter. Due to the efforts in environment protection and restoration of ecological function, the region has become a hub for a growing number of bird species, including swans, Ruddy Shelducks and egrets. (Photo/Asianewsphoto)
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