1. Log in to the China Construction Bank online banking system and find investment and financial management in the sub-column.

2. Click on Investment and Financial Management, a submenu will appear, and then select New Depository Contract and Change Contract in turn.

3. In the new window, select the bank account that was originally signed and bound to the stock account, and click Next.

4. Check the account information, select the change information (that is, select the newly bound account) and confirm the securities information.