Swans are seen on the Guanting Reservoir in Huailai County, north China's Hebei Province, Nov. 14, 2017.
Xinhua Photo/Yang Shiyao
Xinhua Photo/Yang Shiyao
Xinhua Photo/Yang Shiyao
Xinhua Photo/Yang Shiyao
Xinhua Photo/Yang Shiyao
Xinhua Photo/Yang Shiyao
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Swans are seen on the Guanting Reservoir in Huailai County, north China's Hebei Province, Nov. 14, 2017.
Xinhua Photo/Yang Shiyao
Xinhua Photo/Yang Shiyao
Xinhua Photo/Yang Shiyao
Xinhua Photo/Yang Shiyao