The processing place of ca certificate is: the window of local tax hall. To apply for a ca certificate, the parties concerned should bring a copy of the business license (photocopy), a copy of the tax registration certificate (stamped with the official seal of the company) and a USB flash drive to the local tax hall window to apply for downloading.

Legal objectivity:

"Measures for the Administration of Electronic Certification Services" Article 2 The term "electronic certification services" as mentioned in these Measures refers to the activities of providing authenticity and reliability verification for all parties concerned with electronic signatures. The term "electronic certification service provider" as mentioned in these Measures refers to an institution that provides certification services for electronic signatures requiring third-party certification (hereinafter referred to as "electronic certification service institution"). Electronic certification service institutions that provide services to the public shall be established according to law.