Passengers, with or without seats, are seen on train No. K497 which travels from Beijing to Jagdaqi in northeast China's Heilongjiang Province, Jan. 21, 2019. Train No. K497 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)