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Railway policewoman Luo Yakun patrols the railway line crossing Haiyuan County and its neighboring Tongxin County in northwest China's Ningxia Hui Autonomous Region, Jan. 23, 2019. (Xinhua/Wang Peng)

Railway policewoman Luo Yakun patrols the railway line crossing Haiyuan County and its neighboring Tongxin County in northwest China's Ningxia Hui Autonomous Region, Jan. 23, 2019. (Xinhua/Wang Peng)