there is no need to pay back the money.

Pre-authorization means that this amount can only be used for consumption here, occupying the limit of your credit card.

it doesn't mean that you have already spent, unless you have already spent this amount.

the so-called pre-authorization of repayment refers to the transaction in which the issuing institution or its agent confirms that the credit line is allowed to be frozen before the cardholder pays. In other words, pre-authorization refers to the transaction that the card issuing department needs to make a promise to the merchant for future payment because the consumption amount is uncertain when the customer consumes. The amount of the pre-authorized transaction will be frozen, and it is not allowed to participate in other transactions until the pre-authorized settlement of the corresponding transaction occurs.

Pre-authorization of credit card refers to the transaction in which the card issuer or its agent confirms that the license is frozen before the special merchant deducts money. Pre-authorization will occupy the credit line of the card. When the customer settles the pre-authorization, the pre-authorization will be cancelled. Within 3 days of the pre-authorization, if the customer fails to settle the account, the pre-authorization will be cancelled.