Railway workers patrol tunnel to ensure safe operation of trains

Railway worker Liao Chenggen (L) and group leader Luo Changwei check the railway condition in 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.

Railway worker Liao Chenggen works in Dengshan tunnel in Hechi, south China's Guangxi Zhuang Autonomous Region, Jan. 30, 2021. 

First "Qilu" freight train leaves E China's Jiaozhou for capital of Azerbaijan China vows more COVID-19 vaccines to developing countries