Is it safe to pay for pos machines with the letter E?

Safe. I believe that the electronic payment pos machine is safe, and it has been authenticated by real name at the time of registration. I know every time I swipe my card, so the information is kept in the platform. Moreover, this company is a legal enterprise, which will be protected by law and there is no danger. POS(Pointofsales), which means "point of sale" in Chinese, is called point of sale information management system. It is a terminal reader equipped with bar code or OCR code technology, which has the function of cashier in cash or barter bank. Its main task is to provide data services and management functions for commodity and media transactions, and to carry out non-cash settlement.