A railway technician examines a railway line manually in a tunnel at the Liupanshui engineering and electricity section of China Railway Chengdu Group in Liupanshui, southwest China's Guizhou Province, Feb. 11, 2019. The Spring Festival travel rush witnessed a surge in passenger flow. Railway technicians, with an increasing workload, worked carefully to secure railways for the Spring Festival travel rush. (Xinhua/Tao Liang)