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Cleaners clean a bullet train in Guilin, south China's Guangxi Zhuang Autonomous Region, Feb. 16, 2018. Many people still stick to their posts during the Spring Festival holidays. (Xinhua/Wang Zichuang)
Cleaners clean a bullet train in Guilin, south China's Guangxi Zhuang Autonomous Region, Feb. 16, 2018. Many people still stick to their posts during the Spring Festival holidays. (Xinhua/Wang Zichuang)