Ctrip cannot change its visa and needs to choose a specific location.

Ctrip can't change tickets, and the specific location needs to be selected as follows.

1. Search the train ticket exchange function area on Ctrip website or mobile App, and log in to Ctrip account.

2. Choose appropriate ticket information according to your travel needs, including departure place, destination, travel date, train number, seat level and quantity.

3. Enter the payment page, select "Pay by exchange voucher", and then pay by entering the exchange code or selecting the bound exchange voucher to complete the operation of exchanging train tickets.