1. How to book domestic air tickets on Ctrip? After entering Ctrip's homepage, click "Domestic Air Tickets" and then operate in the following order: 1) Enter the "Domestic Flight Inquiry" interface and fill in the corresponding information in each information column correctly; 2) Click "Query and Book" and select the flight you need; 3) Click "Next" and fill in the "Ride Information" accurately after confirming that the ticket information is correct; 4) If there is a corresponding airline mileage accumulation card and mileage needs to be accumulated, please fill in the passengers in the last column; 5) Click "Next" to select the air ticket delivery method, fill in the address information correctly, and select the corresponding payment method; 6) Click "Submit". If you choose to pay by credit card, please fill in the relevant contents in detail. What information is needed to provide credit card guarantee or payment? For different card-issuing banks, you need to provide the following credit card information: 1, card type 2, card number 3, expiration date 4, cardholder name 5, cardholder's valid ID number 6, cvv/cvc verification code. If you use credit cards issued by overseas, Hong Kong, Macao and Taiwan banks, you need to provide the following additional information: 1 Issuer 2. Issuer's country 3. The cardholder's billing address must be accurate. We reserve the right to cancel the order if the bank verifies that the above information is incorrect. During the audit, you may need to provide the following relevant materials: 1. Power of attorney; 2. Copies of the front and back of the credit card (with the cardholder's signature on the back of the credit card); 3. A copy of the cardholder's valid identity document.