Amateur photographers take photos of winter scenery at Hukou Waterfall, a section of the middle reaches of the Yellow River, in Jixian County of Linfen City, North China's Shanxi Province, Febuary 10, 2014. Photo: Xinhua

Combination photo taken on Febuary 10, 2014 shows the winter scenery at Hukou Waterfall, a section of the middle reaches of the Yellow River, in Jixian County of Linfen City, North China's Shanxi Province. Photo: Xinhua

Photo taken on Febuary 10, 2014 shows the winter scenery at Hukou Waterfall, a section of the middle reaches of the Yellow River, in Jixian County of Linfen City, North China's Shanxi Province. Photo: Xinhua

Photo taken on Febuary 10, 2014 shows the winter scenery at Hukou Waterfall, a section of the middle reaches of the Yellow River, in Jixian County of Linfen City, North China's Shanxi Province. Photo: Xinhua

Tourists watch winter scenery at Hukou Waterfall, a section of the middle reaches of the Yellow River, in Jixian County of Linfen City, North China's Shanxi Province, Febuary 10, 2014. Photo: Xinhua

A rainbow arches the Hukou Waterfall, a section of the middle reaches of the Yellow River, in Jixian County of Linfen City, North China's Shanxi Province, Febuary 10, 2014. Photo: Xinhua