How can I buy a train ticket on my mobile phone?

The first method: pick up the ticket at the train station window.

You can pick up the ticket at the window of the railway station with your ID card. You can set your own time to pick up the tickets, not too late. If you run into a queue and miss the train, you will be in trouble. So be sure to pick up the tickets in advance.

The second method, automatic ticket machine to pick up tickets.

Every railway station has an automatic ticket collection office. Put your ID card in the corresponding position and click the screen to get the ticket.