A tourist selects coal sculptures at Yungang Grottoes in Datong, north China's Shanxi Province, Nov. 9, 2016. It needs more than 10 processes, including cutting, carving and polishing, to make a coal sculpture. (Photo/Xinhua)
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A tourist selects coal sculptures at Yungang Grottoes in Datong, north China's Shanxi Province, Nov. 9, 2016. It needs more than 10 processes, including cutting, carving and polishing, to make a coal sculpture. (Photo/Xinhua)
