On the front, the direction of CCB chip card is on the left side of the card. When in use, insert the card into the device (POS machine or ATM machine) from left to right, that is, insert it into one side of the chip first. So you can read the chip. If the electronic tag device (OBU) inserted in the car has to pay the toll when crossing the expressway, it is suggested to expose the chips in turn, so as to ensure the normal reading of the chips.