Generally speaking, you don't need a credit card guarantee to book a hotel on Ctrip. If you don't show it, your score will be deducted. If the housing is tight or the hotel has special requirements, a credit card guarantee is needed. Credit cards can support unauthorized deduction without cards, but debit cards are not allowed. So if you need a guaranteed reservation, you must use a credit card, because if you don't show it, the hotel will ask Ctrip for money, and Ctrip will deduct your default room rate through card-free authorization.