Legal analysis: Patent substantive examination means that when the patent office examines an application, it must not only examine the formal requirements of the application, but also whether the invention-creation in the application meets the novelty, Substantive elements such as creativity and practicality will be reviewed.
Legal basis: "Patent Law of the People's Republic of China" Article 35 Within three years from the filing date of an invention patent application, the patent administration department of the State Council may, upon request submitted by the applicant at any time, The application shall be subject to substantive examination; if the applicant fails to request substantive examination within the time limit without justifiable reasons, the application shall be deemed to have been withdrawn. When the patent administration department of the State Council deems it necessary, it may conduct a substantive examination of an invention patent application on its own.