The earliest domestic POS terminals only supported bank cards in the form of magnetic cards, and did not support bank cards in the form of IC cards in terms of hardware. European and American countries launched the first version of the EMV specification in 1994, and after unifying the IC bank card standards of the three largest international card issuers (EuroPay, MasterCard, Visa), they began to transform the POS terminals at that time into EMV so that they could support IC card reading. By around 2005, POS terminals in European and American countries basically supported IC card reading. At this time, my country's POS machines do not yet support IC card reading, and on the other hand, the price is still high. The price of a single POS machine may be around 5,000 yuan. If the whole machine is replaced, the cost is Unacceptable. However, if we give up following the example of European and American countries in implementing EMV transformation of terminals, the economic losses caused by magnetic card fraud will become increasingly large. Therefore, when you encounter a dilemma, you always need a solution that takes into account both ends - the current domestic split POS is actually not an old idea or a habit problem - in fact, it is a transformation given for this situation. plan. If you observe, you will find that the PIN pad of the split POS is equipped with a magnetic card swiper and an IC card slot for reading IC cards - yes, in order to enable POS terminals to read IC cards As part of the upgrade, the manufacturer integrated the IC card reading function into the PIN pad. The PIN keyboard also integrates magnetic card reading, NFC (contactless) card reading, electronic signature and other functions into the PIN keyboard. Therefore, there is no need to modify the POS terminal host, and it can be upgraded to a new terminal with advanced functions such as IC card reading, NFC (contactless card) reading, and electronic signature. The host of the POS terminal only needs to focus on completing the non-card reading parts and communicating with the bank's backend. Of course, compared with the one-step POS machines in Europe and the United States, the above solution is obviously a compromise. However, when hundreds of thousands of POS terminals needed to be upgraded, no one had a better choice. At present, the newly developed products of domestic POS machine manufacturers have integrated all the above functions, and there is basically no need for an external split password keyboard. However, in actual use, it is very convenient to place the POS host in front of the teller and the PIN pad in front of the customer. There is no need to pass the handheld POS machine around during checkout.