Photo taken on May 24, 2015 shows a view of Dunhuang Yardang National Geopark in Dunhuang, northwest China's Gansu Province. (Photo: Xinhua/Wang Song)
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Photo taken on May 24, 2015 shows a view of Dunhuang Yardang National Geopark in Dunhuang, northwest China's Gansu Province. (Photo: Xinhua/Wang Song)