Video PlayerClose
Workers celebrate as they cut through the Badaling tunnel of the Beijing-Zhangjiakou high-speed rail line in Beijing, capital of China, Dec. 13, 2018. (Xinhua/Ren Chao)
Workers celebrate as they cut through the Badaling tunnel of the Beijing-Zhangjiakou high-speed rail line in Beijing, capital of China, Dec. 13, 2018. (Xinhua/Ren Chao)