A salesman who handles credit cards cannot handle credit cards for others without a qualification certificate. Credit card salesmen must have professional knowledge such as credit lending, risk control and credit card billing. If you want to be a credit card salesman, you must have the above professional knowledge to be competent. As a bank employee, you must have a banking qualification certificate. The bank qualification certificate must pass the examination and certification before it can be obtained. The qualification certification system of Chinese banking practitioners consists of four basic links, namely, qualification standards, examination system, qualification examination and continuing education. Credit cards are generally issued by banks. If you want to be a credit card salesman, you must be a bank clerk. No bank is a part-time salesman to handle credit cards. To work in a bank, you must have certain financial knowledge, and the bank should have its own set of assessment methods for credit card salesmen.