According to the information you provided, the card cannot be swiped because of POS machine problems, line problems, specific merchants or communication problems. If your card status is normal and your credit limit is sufficient, but you can't swipe your card, it is recommended that you pay this transaction by other means.
At present, WeChat service has been opened. You can pay attention to the official WeChat of Ping An Credit Card, and the information is mastered in one hand!