No.

There is no tax deduction for credit card purchases.

A credit card is a bank card with a certain credit limit issued by the bank based on the customer's comprehensive score. The cardholder can consume first and then repay within the credit limit. Enjoy an interest-free period of 25-56 days.

It is recommended that after using a credit card for consumption, repay according to the bill before the final repayment date.

If you pay with a credit card, there is a maximum interest-free period of 50 days, and some banks are 56 days.

If you are paying by credit card to buy things in installments, ask the merchant if there are any handling fees. Different installments have different interest rates.

If you go to an ATM to withdraw cash, interest will be calculated on the day you withdraw the cash, at 0.5% per day until you repay the money. Then there are cash withdrawal fees, and the amount charged by each bank is different.