For international train tickets : We currently do not support changes to your train ticket, including date, time, or departure-arrival adjustments. If you need to alter your travel plans, we recommend that you cancel your existing ticket and purchase a new one for your desired schedule. Please be aware that cancellation fees may apply, and we encourage you to review the refund policy associated with your ticket before proceeding.
For Mainland China and Hong Kong Cross-boundary train: You can change departure date and arrival station within the specified time frame as indicated in the product page instructions.