Nowadays, payment methods are becoming more and mroe flexible, and more people are using Paytm, PayPal, Venmo, and other methods to make payments. By scanning a QR code, people can complete their payments very quickly. To prevent miss payment or less payments and reduce errors, the payment soundbox (also called cloud soundbox or 4g/wifi soundbox) comes in handy. So how does the payment soundbox/speaker work? Please see below flowchart.

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