2. At this time, you need to log in to your personal stock account again and enter the corresponding password to complete the login, as shown in the figure below.

3. At this time, you will see the personal stock account, as shown in the figure below.

4. Then find the column of "Account Inquiry" and click "Third Party Depository Bank Change" under this module, as shown in the following figure.

5. When the bound bank card account information appears, click "Change Bank Card" under the bank card, as shown in the following figure.

6. Select the changed bank and enter the changed bank card number, as shown in the figure below.