A railway staff looks through a frosted window on train No. 6245 which travels from Qiqihar to Gulian in northeast China's Heilongjiang Province, early on Jan. 23, 2019. Train No. 6245 is one of China's most economical railway trains which are bound for remote destinations. During China's Spring Festival travel season, these "slow trains" offer passengers an alternative choice to go home at a cheap fare. (Xinhua/Wang Yuguo)