1. A credit card is a card that can be overdrafted interest-free;

2. If you have good credit and repay on time, you can borrow money from the bank interest-free for up to 50 days. ;

3. How to use: You can swipe your card at the POS machine, shop online, and withdraw cash when you are in urgent need of money (this requires payment of handling fees and interest, and is not recommended).

In short, it has many benefits and is very convenient, but you should pay attention to protecting the card information and password, and don’t forget the repayment time.