legal basis
Article 15 of the Detailed Rules for the Implementation of the Patent Law of the People's Republic of China
Anyone who applies for a patent in writing shall submit the application documents in duplicate to the patent administration department of the State Council.
those who apply for a patent in other forms prescribed by the patent administration department of the State Council shall meet the prescribed requirements.
if the applicant entrusts a patent agency to apply for a patent and handle other patent affairs with the patent administration department of the State Council, it shall also submit a power of attorney, indicating the authorization authority.
where there are two or more applicants and no patent agency has been entrusted, unless otherwise stated in the request, the first applicant specified in the request shall be the representative.