Wu Guohua, head of a maintenance team, inspects the pantograph of a bullet train in Taiyuan, north China's Shanxi Province, Feb. 16, 2022. In spite of the cold weather, a maintenance team under China Railway Taiyuan Group Co., Ltd. inspects over 70 different types of electric multiple unit (EMU) trains on a daily basis to ensure that local bullet trains run smoothly. (Xinhua/Cao Yang)
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