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New Badaling tunnel of Beijing-Zhangjiakou high-speed rail line cut through

CHINA-BEIJING-ZHANGJIAKOU-RAILWAY-TUNNEL-CONSTRUCTION (CN)

Workers build the New Badaling tunnel of the Beijing-Zhangjiakou high-speed rail line in Beijing, capital of China, Dec. 13, 2018. Workers have achieved a major breakthrough in the Beijing-Zhangjiakou high-speed rail line project, after they dug through the New Badaling tunnel, a pivotal part along the line, on Thursday. (Xinhua/Xing Guangli)

[ Editor: Zhang Zhou ]