how to buy train tickets online is as follows: material: mobile phone: Xiaomi 8 version: miui11..4, software: WeChat version: 7..11. First, we enter WeChat, and then click the payment option in my interface. 2. After entering the payment option, you can see the train ticket option by pulling down the place where the mud sleeps. Click on the train ticket option. 3. Then choose the station where you want to leave and arrive, and then click on the train ticket to inquire. 4. After entering the train ticket inquiry, click on the flight you want to take. 5. After entering the flight you want to take, click on the seat you want to choose, whether to choose a strong sleeper or a hard seat. 6. After selection, you need to add buyer information. Click Add Passenger Message, and then click Next. 7. After filling in all the information, just click Submit Order and you can buy the train ticket online.