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People visit the Mogao Grottoes, a world cultural heritage site, in Dunhuang, northwest China's Gansu Province, April 18, 2019. (Xinhua/Zhang Xiaoliang)
In pics: Mogao Grottoes in Dunhuang, NW China's Gansu
Source: Xinhua| 2019-04-19 15:48:18|Editor: ZX
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