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Photo taken on Oct. 18, 2019 shows the fresco in the Arjai Grottoes of Otog Banner in Ordos, north China's Inner Mongolia Autonomous Region. (Photo by Li Zhipeng/Xinhua)
Photo taken on Oct. 18, 2019 shows the fresco in the Arjai Grottoes of Otog Banner in Ordos, north China's Inner Mongolia Autonomous Region. (Photo by Li Zhipeng/Xinhua)