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A visitor takes photos at Keketuohai national geopark in northwest China's Xinjiang Uygur Autonomous Region, Oct. 6, 2018. (Xinhua/Xu Wen)

A visitor takes photos at Keketuohai national geopark in northwest China's Xinjiang Uygur Autonomous Region, Oct. 6, 2018. (Xinhua/Xu Wen)