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The existed smart cards replace traditional money exchange, transportation fares, or even our home keys. Although the use of smart cards makes our lives much easier, it is inconvenient for users to manage various smart cards in a wallet. Thus, an All-in-one Smart Card which can solve all the inconveniences is proposed. Users could snap different chips in the All-in-one Smart Card. The user can rotate the side switch and choose the proper chip for shopping. With the All-in-one Smart Card, we won't have to worry about our thick wallet or carrying a deck of cards, and it is definitely saving resources.