1. First, find and open Kingdee K3 software in the computer, come to the login interface, and enter the account number and initial password.

2. Then find and click the "Change Password" option in the upper right corner.

3. Click the password modification option, and then in the pop-up interface, you will see the password modification window as shown in the figure below.

4. Then in this window, enter the new password and click OK.

5. Click OK to return to the login page and re-enter the new password you just set to log in.