Principle of ic card: The basic principle of ic card is that the RF reader sends a set of electromagnetic waves with fixed frequency to the ic card, and there is an ic series resonant circuit in the card, whose frequency is the same as that emitted by the reader, so that the LC resonant circuit resonates under the excitation of electromagnetic waves and charges the capacitor; At the other end of this charge, a unidirectional electronic pump is connected to send the charge in the capacitor to another capacitor for storage. When the accumulated charge reaches 2V, this capacitor can be used as a power supply to provide working voltage for other circuits, send data in the card or receive data from the card reader.

Credit card consumption refers to a settlement method in which customers use wealth management accounts, Peony Smart Card E Times, Peony Smart Card, Peony International Card, Peony Credit Card, Peony Credit Card and various co-branded cards to make credit card payments, and the money is deducted from relevant bank cards.