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Rescuers walk out the site of a rock burst accident in Yuncheng County, east China's Shandong Province, Oct. 27, 2018. As two more miners were confirmed dead, the death toll rose to 13. Another eight miners remain trapped. The accident occurred at Longyun Coal Mining Co. Ltd. in Yuncheng County on Oct. 20. (Xinhua/Guo Xulei)