What you need to prepare includes but is not limited to:
Relevant patent certificate (please note that the applicant should be consistent with the complainant, if not, please provide the patent certificate and the proof that the intellectual property owner authorized the complainant to make a complaint (with the signature/seal of the intellectual property owner));
If it is an appearance patent or a utility model patent, a patent evaluation report (issued by the Patent Office) shall be provided;
Websites related to infringing goods, shop tricks and shop announcements;
Other proof of infringement;
Remind you to distinguish between patent right, trademark right or copyright infringement, and submit materials according to relevant requirements.
I hope I can help you.