The method is as follows: You can go to the bank of the fund account to change the bank card association corresponding to the fund account with valid identity certificate, and associate the fund account to the new bank account.

The account for buying and selling funds is bound to a special third-party custody service. Unless the third-party custody is unbound, the bank card is not allowed to close the account.

You should go to the bank to confirm carefully, or you can also look for the previous agreement for third-party custody or custody of assets.