1. First use IE8, IE9, IE10, and IE11 under the Simplified Chinese system. Use this browser to log in to the China Patent Electronic Application Network, enter the user code and password, and click "Login to External Services".
2. Secondly, in the certificate management column, select the digital certificate that needs to be updated in the certificate information list, and click the "Digital Certificate Update" button to update.
3. Finally, if you use the same computer to update, it is recommended that you delete the expired certificate.