Specific steps to change train tickets booked on WeChat:

1. If you have purchased or purchased tickets through the WeChat app, you can change your tickets according to the following methods. First, enter the WeChat wallet and click "Train Ticket" in the third-party service column.

2. After entering this page, click on train tickets under the order column, as shown in the picture.

3. Click on the train ticket to enter the personal order information page. You can click on the order that needs to be changed.

4. Now you can see the details of your order. Click the change button under the ticket information on the order details page.

5. Then a window will pop up on the page asking whether to confirm the change. Click Confirm at the bottom of the window.

6. After clicking Confirm, the page displays the trains you can change. Click in the list to select the train you want to change.

7. After clicking on the train number, select the seat level and click the change button next to the corresponding seat level.

8. After clicking Change, your original ticket and changed ticket information will be displayed on the page. After confirming that they are correct, click Submit Change at the bottom of the page.

9. Then click Confirm Change in the lower right corner of the page.

10. The page will pop up again asking whether to confirm the change, click Confirm.

11. After a while, the change results will be displayed on the page. If it does not appear for a long time, please click "Refresh Ticketing Results" at the bottom.

12. If you see a successful ticket purchase message at the top of the page, then you have changed your train ticket.