With the development of urban intelligent industry and the increasing needs of users, more and more people are aware of the the importance and urgency of realizing national city card all-in-one. Since the Ministry of Housing and Urban-Rural Development proposed the concept of establishing national city card interconnection, CARDLAN actively developed a set of urban bus payment system according to industry requirements and user needs, which integrated RFID, NFC card payment and QR code payment as well as face recognition payment.