In fact, the amount to be settled on UnionPay's cardless fast payment platform is the pre-authorized payment of credit card (debit card).

Pre-authorization of credit card (debit card) refers to the transaction that the card issuer or its agent confirms that the license is frozen before the deduction of the special merchant. Pre-authorization will occupy the credit limit of the card. Pre-authorization will be cancelled when the customer settles the account. Within 30 days after the pre-authorization, if the customer fails to run the settlement, the pre-authorization will be cancelled.