The workflow of our intelligent vending machines is as follows: 1. Customers select products by touching the screen or pressing physical buttons; 2. The machine immediately generates a QR code based on the selected product's price and displays it on the screen. At the same time, the vending machine sends the product price information to the backend server. 3. Customers scan the code to make the payment, with the account directly entering the backend service account. Once the backend detects the account, it sends instructions to the intelligent vending machine, such as "Payment received, please proceed with the delivery." 4. Upon receiving the backend server's instructions, the intelligent vending machine delivers the product. 5. Customers retrieve the product from the vending machine's dispensing slot, completing their purchase.