WAP Flowchart

Key Step Instructions:

• Step 2 The merchant initiates the order from the backend and receives a payment link.
• Step 6 The merchant's webpage can redirect to the payment link, allowing the user to proceed with the payment.
• Step 21 After the payment is completed, the merchant will receive an asynchronous notification regarding the payment result. If not received (some payment types do not support asynchronous notification), the merchant needs to actively query.