1. The secondary card is not enabled and needs to be enabled to swipe. \x0d\2. The main card has been canceled or deactivated by ICBC for some reasons. \x0d\3. Some bank credit cards will open online shopping cards, which facilitate online purchases directly by number. The appearance of this card is not much different from the main card, but it cannot be used for regular credit card swiping. It can only be used online. Make sure you have not picked up the wrong one for online shopping. Card. \x0d\4. The supermarket credit card machine is broken or the network is delayed. \x0d\5. The secondary card may be broken and needs to be replaced with a new one.