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YISHUI, June 8, 2016 (Xinhua) -- Photo taken on June 7, 2016 shows the scenery of a karst cave under the Longgang Mountain in Yishui, east China's Shandong Province. The cave has a total length of 6,100 meters. (Xinhua/Chen Junqing)
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YISHUI, June 8, 2016 (Xinhua) -- Photo taken on June 7, 2016 shows the scenery of a karst cave under the Longgang Mountain in Yishui, east China's Shandong Province. The cave has a total length of 6,100 meters. (Xinhua/Chen Junqing)
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