"Pathfinder" train important in guaranteeing passengers' safety

A staff member checks the "pathfinder" train departing from the Wuhan Railway Station in Wuhan, capital of central China's Hubei Province, Jan. 25, 2018. The "pathfinder" train, which drives before all high-speed trains for checking safety problems, plays an important role in guaranteeing passengers' safety during their travel. (Xinhua/Xiao Yijiu)