2. Always swipe a small credit card. Frequent use of credit cards is indeed a standard for banks to increase the credit card limit, but it is useless to make some small purchases for the number of swipes.
3. swipe your credit card. For high-quality customers of the bank, credit cards may be added, but if they are not high-quality customers of the bank, they are likely to be locked in a small black room.
4. Frequent large credit card swiping. The amount and time of swiping cards should be controlled within a reasonable range as far as possible. If the same merchant brushes several large sums regularly, the bank will mistake it for malicious cash withdrawal.