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Now the technology will use the antenna and the IC card coil to generate resonance data, so as to complete the communication between the module and the card. There is a set of registers to be modulated to transmit buffer data and then get the transmit signal, in the form of a pin driven antenna to transmit electromagnetic waves. The implementation of this technology is due to the cooperation of IC card. In many ways, it has its own form, such as the ticket now. Passenger operation is very comfortable, but also easy to bend, resulting in IC card chip damage.