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Photo taken on Dec. 9, 2017 shows icicles on the Hukou Waterfall scenic spot on the Yellow River, northwest China's Shaanxi Province. (Xinhua/Su Qiang)
Photo taken on Dec. 9, 2017 shows icicles on the Hukou Waterfall scenic spot on the Yellow River, northwest China's Shaanxi Province. (Xinhua/Su Qiang)