![White swans seen in Sanmenxia, Henan Province(3/3)](http://www.ecns.cn/hd/2018/02/08/3d56197d1949410db474b8a0590181ba.jpg)
A group of white swans are seen in a wetland park in Sanmenxia city, Henan Province, Feb. 3, 2018. Sanmenxia attracts a third of the white swans that migrate from Siberia to spend winter in China. And the city has designated a protection period from the end of October to March for these precious birds. (Photo by Zhang Tao/Asianewsphoto)