What does the difference refund mean? Ctrip student ticket

Ctrip student ticket difference refund means that after the ticket is successful, the difference is refunded according to the actual fare amount. Return the difference to the payment account within 1-3 working days after the successful ticket purchase. If you haven't received the refund, you can consult the website 12306. The student tickets bought by Ctrip cannot be discounted with the student ID card, and the train tickets bought with the student ID card can only be bought at the official website ticket window or the station 12306.