The steps to operate this card settlement voucher on your mobile phone are as follows:

1. Download and install the mobile banking application or open the online banking website through the mobile browser.

2. Log in to the mobile banking or online banking website and enter the credit card account page.

3. Search for "Issue Certificate" on the credit card account page and select "Credit Card Account Settlement Certificate."

4. Click the "Certificate Application" option, select the card number and fill in the email information and SMS verification code.

5. See the credit card account settlement certificate stamped with the electronic official seal in the mailbox.