In two cases, one is that the balance in your card is sufficient (specifically, when you need to deduct money), and the bank has not deducted it. It may be that the bank deduction has been delayed, so don't worry, just wait for a day or two; The other is that the balance in your card is insufficient (especially when you need to deduct money), and the bank has not deducted money. You may have to call the bank customer service to see if you can deduct the money automatically. If not, you can let mobile banking or online banking transfer money by yourself. Of course, you can also pay at the bank's business outlets.