1. First, click on Sinopec Supermarket to run the cashier system, log in to your account, and check whether the product files on the Sinopec Supermarket cashier system have been downloaded.

2. Secondly, pick up the code scanning machine and scan the trademark code of the product. If the code is scanned successfully, a sound will be made and the software will automatically count. If there is no sound, it means the code was not scanned successfully.

3. Finally, after we have scanned all the items that the customer needs to check out, we can press and hold "/" on the keyboard and the checkout interface will appear.