"Pathfinder" train important in guaranteeing passengers' safety

Staff members of a "pathfinder" train arrange the chairs on train on its way from Wuhan to Zhengzhou, 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)