Many cardholders often encounter the phenomenon that they can't swipe their cards when using China Merchants Bank credit cards. There are many reasons why credit cards cannot be swiped. Here, Bian Xiao will introduce you to several common reasons. If the card can't be swiped, let's see if it's these reasons: 1, the credit card is not opened, and you need to call to activate the card to swipe it; 2. When the credit card reader is in use, the line is busy, or the credit card reader itself is out of order, and the transaction information cannot be transmitted; 3. The available credit card amount is insufficient and exceeds the available credit amount, so it is naturally impossible to swipe the card; 4. The magnetic stripe on the back of the card may be demagnetized or the card may be damaged, so you need to replenish the card before swiping it. 5. The state and regulatory agencies restrict or prohibit consumption. For example, the banking regulatory bureau has restrictions on non-personal daily consumption such as housing, building materials and wholesale.