Can I cancel my reservation for the high-speed rail ticket?

Of course. According to the inquiry of Ctrip Travel app, if you booked a high-speed rail ticket online, you can use 12306APP to cancel the order. How to cancel the high-speed rail ticket booking: just cancel the order on the "My Order" page of WeChat official account. If you have already grabbed the ticket or canceled the order after successfully grabbing the ticket, you need to pay a certain handling fee or choose to refund the ticket.