The first type: pos machines with real business licenses, such as UnionPay business POS machines and POS machines handled by banks. These pos machines are all handled with your real personal information, and your own card and POS machine are the name of a handler. It is definitely not possible to swipe your card yourself.
The second type: POS machines handled by third-party companies. This machine can swipe its own card, but in theory there is no profit or risk. Because most of the market are secondary cleaning machines. For example, in theory, an ordinary third party like Lacarra Love UBS can also handle it with your real business license. However, due to the fierce competition in the market, the third party usually handles it for you in the form of two or three clearing. In this way, you can apply for a lower rate than that stipulated by UnionPay. In this way, the profits of third-party companies will also increase. Such as code skipping sets. If you don't understand, it is basically what you believe.