Workers prepare the drill-through of a railway tunnel in Du'an Yao Autonomous County, south China's Guangxi Zhuang Autonomous Region. Sept. 1, 2021. A 15.2-km tunnel on the high-speed railway linking Nanning of south China's Guangxi Zhuang Autonomous Region and Guiyang of southwest China's Guizhou Province was drilled through on Thursday.Photo:Xinhua
A worker prepares the drill-through of a railway tunnel in Du'an Yao Autonomous County, south China's Guangxi Zhuang Autonomous Region. Sept. 1, 2021.Photo:Xinhua
Workers clear a railway tunnel after it was drilled through in Du'an Yao Autonomous County, south China's Guangxi Zhuang Autonomous Region. Sept. 2, 2021.Photo:Xinhua
Workers prepare the drill-through of a railway tunnel in Du'an Yao Autonomous County, south China's Guangxi Zhuang Autonomous Region. Sept. 1, 2021.Photo:Xinhua
Workers celebrate the drill-through of a railway tunnel in Du'an Yao Autonomous County, south China's Guangxi Zhuang Autonomous Region. Sept. 2, 2021.Photo:Xinhua
Workers celebrate the drill-through of a railway tunnel in Du'an Yao Autonomous County, south China's Guangxi Zhuang Autonomous Region. Sept. 2, 2021.Photo:Xinhua