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
Photo taken on May 13, 2019 shows the inside view of Wanxiang karst cave in Hanwang Township of Longnan City, northwest China's Gansu Province. (Xinhua/Tu Guoxi)
Photo taken on May 13, 2019 shows the inside view of Wanxiang karst cave in Hanwang Township of Longnan City, northwest China's Gansu Province. (Xinhua/Tu Guoxi)