1. First log in to your account and check whether the product file is downloaded.

2. Secondly, when a customer checks out, use the QR code scanning machine to scan the product trademark. If the QR code is successfully scanned, the software will make a sound, otherwise it will make a different sound.

3. After the final scan is completed, press and hold "Checkout" on the payment keyboard to enter the checkout interface, select a payment method, such as cash, Alipay, and WeChat, and proceed with settlement.