Ruins of ancient city walls dating back to Han and Jin dynasties have been discovered in the Lop Nor Desert, Northwest China's Uygur autonomous region, Feb 16, 2017. (Photo/Xinhua)
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Ruins of ancient city walls dating back to Han and Jin dynasties have been discovered in the Lop Nor Desert, Northwest China's Uygur autonomous region, Feb 16, 2017. (Photo/Xinhua)