1. Only the patentee has a patent certificate, not the inventor.
2. You can request a copy of the patent register from the State Intellectual Property Office.
Download the "100031 Request for Copies of Documents" from the "Service Area, Form Download" column on the homepage of the State Intellectual Property Office website. After filling it out, send it to the Patent Office of the State Intellectual Property Office for preliminary review by registered postal mail. and the Business Issuance Management Office of the Process Management Department (referred to as: Issuance Office of the Preliminary Examination Department of the Patent Office) (No. 6, Tucheng Road, Jimenqiao West, Haidian District, Beijing, Postcode: 100088).
About fees. . . . . Dear~~~It’s free~~~