Photo taken on Dec. 27, 2015 shows icicles at Hukou waterfall on the Yellow River on the Shanxi-Shaanxi border, northwest China. (Photo: Xinhua/Lyu Guiming)
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Photo taken on Dec. 27, 2015 shows icicles at Hukou waterfall on the Yellow River on the Shanxi-Shaanxi border, northwest China. (Photo: Xinhua/Lyu Guiming)