Customers can check the passenger train schedule, fares, whether the train is late, remaining tickets, ticket outlets, freight rates, vehicle technical parameters and related passenger and freight regulations when logging on the website. Railway freight customers can handle business through this website. Generally speaking, it is caused by network delay. Refresh several times. If the display is still expired, it proves that the ticket purchase information is invalid and cannot be used. You can call China Railway Customer Service Center to find out the specific reasons, and then re-book.