Night shift workers on the railway

Workers squat on a maintenance platform for the Zhangjiakou-Hohhot high-speed railway on April 17. Nearly 35 maintenance workers start work after the last train runs until at 11:30 p.m. every day to check the overhead catenary cables and ensure security. [Photo/Xinhua]

A worker operates the high-speed train on its way to the maintenance location on April 17. [Photo/Xinhua]