What does credit card pre-authorization mean to complete consumption?

Take the credit card of China Merchants Bank as an example. The normal operation of staying in a hotel is to brush a deposit on the credit card first, and deduct it directly from the deposit when actually checking out, so as to release the remaining credit limit. However, at present, some hotels will swipe their cards twice, first to swipe the deposit, and then to check out. The deposit will be cancelled later, and you don't have to pay the deposit (the deposit will not be shown on the repayment bill). The cancellation time of the deposit is long or short. If you think that occupying your credit limit may bring you inconvenience in using the credit card limit, you can promptly inform and remind the hotel to cancel it for you.