First of all, you have violated the regulations of the People's Bank of China on the management of bank cards. Second, if they use the card to launder money or engage in other illegal transactions, you will be jointly and severally liable.
1. According to the Measures for the Administration of Bank Card Business promulgated by the People's Bank of China, when applying for a bank card, an individual shall provide the issuing bank with his or her own valid identity certificate as prescribed by the public security department, and open a registered account for him or her after passing the examination of the issuing bank. The bank card and its account can only be used by the card holder approved by the issuing bank, and cannot be rented or lent.
2. When a customer handles a bank card, a contractual relationship is formed with both banks. This contractual relationship is not transferable. Therefore, the customer transfers the bank card without the bank's consent, which means that he or she has transferred and changed his or her contractual rights and obligations, which is both a breach of contract and an invalid act.
3. According to the relevant provisions of the Criminal Law, the Banking Law and the Anti money Laundering Law, even if the cardholder is unaware of it, he or she may also bear joint liability.
Legal basis:
Article 28 of the Administrative Measures for Bank Card Business
When an individual applies for a bank card, he/she shall provide the card issuing bank with his/her valid identity certificate as prescribed by the public security department, and open a registered account for him/her after the card issuing bank has examined and found it qualified. The bank card and its account are only used by the card holder who has been approved by the card issuing bank, and cannot be rented or lent.