2, within one month from the date of the request, request to change the patent agency and/or patent agent, shall pay the record item change fee 50 yuan.
3. If the entrustment is dissolved or resigned, the other party shall be informed in advance.
When the entrustment is terminated, the applicant (or patentee) shall submit a declaration on the change of cataloguing items, a termination letter signed or sealed by all applicants (or patentees), or only a declaration on the change of cataloguing items signed or sealed by all applicants (or patentees).
You don't need an agent to do this. It's simple.
One more thing: The project change filing declaration form has been downloaded in official website, China National Intellectual Property Administration.
Simply put, it is to fill out a form and remit it to 50 yuan.