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Du Zhibiao, a railway maintenance worker, conducts deicing work on Nenlin Railway in Mohe, northeast China's Heilongjiang Province, Jan. 23, 2019. (Xinhua/Cai Yang)

Du Zhibiao, a railway maintenance worker, conducts deicing work on Nenlin Railway in Mohe, northeast China's Heilongjiang Province, Jan. 23, 2019. (Xinhua/Cai Yang)