What should I do if I booked the wrong train number and want to change it?

I remember you can cancel and reorder

You can change the booking. After the successful booking, if you make a wrong booking, it will be directly in my order, where there will be refunds and changes.

Hello, you can click "My" → "All Orders" at the bottom right of the Ctrip homepage on your mobile phone, click "Change" after finding the booked ticket, and then follow the prompts on the webpage to choose other flights you want. <br/>If it can help you, please click the green 'Accept', thank you.