
A worker checks the water spurting out in a tunnel drilled through the Dadu Mountain in Guanling Buyi and Miao Autonomous County, southwest China's Guizhou Province, Oct. 14, 2015. Stretching through the complicated karst terrain, the 11.82-kilometre tunnel, a part of the new high-speed railway connecting Shanghai and southwest China's Kunming, was drilled through on Oct. 15 after five years' construction. (Xinhua/Liu Xu)
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