A worker from the Datong West Power Supply Section of China Railway Taiyuan Group conducts de-icing work on rail infrastructure including tracks and power cables in Datong, Shanxi province, to safeguard railway power supply amid a cold snap sweeping northern China. Amid peak cold and frigid temperatures, staff members carry out de-icing operations in railway tunnels, monitor ice accumulation in real time and ensure the safe operation of heavy-haul trains on the lines.