when handling credit cards, banking financial institutions should follow the principle of prudence to issue credit cards to students, and may not issue credit cards to students under the age of 18. When issuing credit cards to students who have reached the age of 18 and have no fixed jobs and stable income sources, the second repayment source must be implemented, and the second repayment source should have the corresponding repayment ability. Before issuing credit cards, banking financial institutions must confirm that the second repayment source has agreed in writing to bear the corresponding repayment responsibilities, otherwise they may not issue cards.