The supplementary bank card is locked and the main card cannot withdraw money. The supplementary card is locked and unlocked in the same way as the main card. There are the following solutions:

Industrial and Commercial Bank of China's handling method: If the cardholder enters incorrectly three times in total, the cardholder will be locked. After being locked, the cardholder needs to bring the credit card and his or her valid ID card to the local credit card center to handle the unlocking procedure.

Bank of China’s processing method: When the cardholder enters the wrong password three times in total, the Bank of China Credit Card Center will automatically unlock it after 24 hours.

China Merchants Bank’s handling method: When the cardholder enters the wrong password three times in total, the credit card will be locked. When the card is locked, the cardholder calls the China Merchants Bank credit card customer service hotline and is transferred to manual service. After the customer service specialist checks the cardholder's information, he or she will reset the query password for you.