1. According to the query on Caiti.com, enter the official website of the selected payment institution or download its official application, register a merchant or self-employed account, fill in the required personal or merchant information, and proceed For necessary verification and authentication, in the account settings, find the QR code collection function or scan code collection settings, and submit an application to obtain a personal credit card QR code collection code.

2. The payment institution needs to verify and review the user's application. After completing the review, the user will be granted the right to collect payments via credit card QR code. Once approved, the user can use the payment institution's application Download or generate the user's credit card QR code collection code. The QR code can be displayed on the mobile phone through the application, or printed out for offline payment.

3. Display the user's credit card QR code payment code to the customer or payer, and allow the user to use their mobile phone to scan the code to pay. The payment institution will settle the payment amount to the user's account.