Legal analysis: If illegally bought and sold bank cards are used for money laundering, tax evasion, fraud, giving gifts, and opening stores to increase credit, those who cause serious impact and financial losses will be sentenced. There are no specific regulations on the number of bank cards.

According to the "Bank Card Business Management Measures", "Bank cards and their accounts can only be used by cardholders approved by the card-issuing bank, and may not be rented or lent.

Legal basis: "Criminal Law of the People's Republic of China" Article 177: Illegal holding of other people's credit cards in large quantities; using false identity certificates to obtain credit cards; selling or buying counterfeit credit cards for others or using false Anyone who obtains a credit card with proof of identity shall be investigated for criminal liability in accordance with the law. Once found guilty of this crime, the person may be sentenced to a fixed-term imprisonment of not less than 3 years but not more than 10 years, and a fine of not less than 20,000 yuan but not more than 200,000 yuan.