The current credit card brings us a lot of convenience in our life. It is safe and convenient to brush the card when going out. In addition, the simple credit card application process has made credit cards popular among college students who do not have independent repayment ability. When they are short of money, they can overdraw, and when it comes to the date of repayment, they will either ask their parents for money or give up studying to work part-time, some even violate credit and give up repayment... Is money the only thing that is overdrawn?