According to the relevant provisions of the Patent Law of People's Republic of China (PRC), when applying for a patent, the applicant needs to submit the necessary written application documents, including the request, specification, patent claim, etc. (The documents can be written by yourself or entrusted by a patent agency), and the application documents can be directly submitted or sent to the reception office of China National Intellectual Property Administration Patent Office or the agency of China National Intellectual Property Administration Patent Office, and the relevant fees should be paid to China National Intellectual Property Administration according to the regulations.