The first step is to log in to cponline.sipo.gov.cn.
Step 2: Click Register in the upper right corner, fill in your name, ID number, contact information and e-cert download method, and then submit.
Step 3, log in to the "external login" of the electronic patent application network and download the certificate.
Step 4, export the certificate from the "Content" option of ie and save it.
Fifth, download the CPC client, install it, and you can apply for a patent electronically.