Buy student tickets on other platforms, and the passenger type registered at 12306 is a student. Adults or other passengers are not allowed to buy student tickets. If the parameters of the prompt information are wrong, the passenger type can be modified by 12306.

Specific steps:

1. Open the ticketing software APP of 12306 railway website, and click and select "My", as shown below:

2. Click to enter the position where your name is displayed in the first line, as shown in the figure below:

3. Click to select the "Personal Information" option displayed in the third line, as shown in the following figure:

4. Enter the file interface, select Modify in the upper right corner of the interface, and click Enter, as shown below:

5. Drop down the "Modify Personal Data" interface, find the "Passenger Type" column, and click "Adult", as shown in the following figure:

6. Change the selection to Student.