A tourist poses for photo with yardang landforms at Dunhuang Yardang National Geopark in Dunhuang, northwest China's Gansu Province, May 24, 2015. (Photo: Xinhua/Wang Song)
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A tourist poses for photo with yardang landforms at Dunhuang Yardang National Geopark in Dunhuang, northwest China's Gansu Province, May 24, 2015. (Photo: Xinhua/Wang Song)