Step 1: Go to the Saipan Forum at 11 noon every day to apply for a certificate, download the "Saipan Special Signing Tool" and "Special Key", and install the signing tool on your computer.
Step 2: Import the certificate and import key (right-click)
Step 3: Sign. Select the software that needs to be signed, right-click the mouse and select "Sign this file" or "Sign all files".