Group 1 - The student ticket reservation service allows booking from 17 to 20 days before the train departure [1] - Students can purchase discounted tickets through the reservation service or during regular ticket sales [2] - A maximum of three pending reservation orders can be submitted per account, with each order allowing five combinations of "train + seat type" for one travel date [2] Group 2 - Seat selection is currently not supported in the student reservation service [3] - If a ticket is changed after reservation, it can still be a discounted ticket if the new ticket is of the same type [4] - Refunds for student discounted tickets will return the discount count only if all segments of a multi-segment ticket are refunded [5] Group 3 - Students who have passed the qualification verification will not need to show their student ID during travel, while those who have not must carry their student ID for inspection [6]