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Tourists pose for photos before icicles at Dadunxia scenic spot in Jishishan County, northwest China's Gansu Province, Dec. 18, 2017. (Xinhua/Shi Youdong)
Tourists pose for photos before icicles at Dadunxia scenic spot in Jishishan County, northwest China's Gansu Province, Dec. 18, 2017. (Xinhua/Shi Youdong)