Credit card pre-authorization means that the merchant freezes a portion of the cardholder's funds before consumption. After the consumption is completed, the cardholder signs, and the merchant can officially deduct this part of the funds. For example, if you go to stay in a hotel, first tell the hotel how many days you want to stay, and the hotel will freeze the charges for these days from your credit card. After you confirm the consumption amount when you check out and leave the hotel,...