Railway worker Liao Chenggen patrols the Dengshan tunnel in Hechi, south China's Guangxi Zhuang Autonomous Region, Jan. 30, 2021. Four workers from China Railway Nanning Group Co., Ltd. patrol the 773-meter-long tunnel in rotation every day to ensure the safe operation of trains running through it. (Xinhua/Zhang Ailin)
Railway workers patrol tunnel to ensure safe operation of trains
Source: Xinhua| 2021-01-31 20:48:22|Editor: huaxia