The final section of rock gave way in the Hufengling Tunnel on Sunday, marking a major step in the construction of Harbin-Mudanjiang high-speed rail line in Northeast China. (Photo provided to chinadaily.com.cn)
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The final section of rock gave way in the Hufengling Tunnel on Sunday, marking a major step in the construction of Harbin-Mudanjiang high-speed rail line in Northeast China. (Photo provided to chinadaily.com.cn)
