Although the card number has changed, your account number will not change, which means that the balance or debt on your previous card will be reflected in the new card, and your old card has been invalidated, so others can't steal it even if they know the password.
Ordinary savings card, the card number must be changed, but if it is a credit card or some debit cards (such as CCB financial card), it will not be changed. Even if the account number of the savings card changes, other personal information in the account will not change. Please consult the issuing bank for details, and the handling of each bank will be different.