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A railway traffic controller of the Chongqing West passenger train depot wipes sweat off his face while working on a summer outdoor shift in southwest China's Chongqing Municipality, Aug. 17, 2019. (Xinhua/Wang Quanchao)
A railway traffic controller of the Chongqing West passenger train depot wipes sweat off his face while working on a summer outdoor shift in southwest China's Chongqing Municipality, Aug. 17, 2019. (Xinhua/Wang Quanchao)