2. The acquiring bank handles the settlement and bookkeeping for the special merchants in the settlement account opened by the merchants.

3. the acquirer sends the sorted transaction information to the corresponding card organization (unionpay, VISA, etc.).

4. the card organization summarizes the transaction data of the acquiring bank, sorts and liquidates the transaction data, and generates reconciliation documents and positions for the issuing bank.

5. The issuing bank receives the posting text and transaction funds of the card organization.