Under what circumstances can I change my visa:

Within 48 hours before driving, you can change other trains before driving, or you can change other trains between 24:00 on the day of the ticket date after driving, without changing the ticket for the next day or after the ticket date;

After driving, passengers can still change their tickets for other trains on the same day, but only at the ticket issuing station. Tickets changed after driving cannot be refunded.

Tickets that have been "changed to the station" will not be changed.

If you change to another train more than/0/5 days before the train starts, and refund your ticket before/0/5 days before the train starts, you will still be charged a refund fee of 5%. If the arrival date of the ticket is changed or changed during the rush hour in Spring Festival travel rush, the refund fee will be charged according to the standard of less than 24 hours before the driving time.