How to judge whether a patent application is single?

Judging whether the patent application is single: two or more independent claims of the same product or method cannot be included in one claim; Independent claims of products and methods dedicated to manufacturing products; The independent claim of the product and the use of the product; The product, the method dedicated to manufacturing the product, and the independent claims for realizing the method and the use of the product, etc.

legal ground

patent law of the people's republic of china

Article 35 Within 3 years from the date of filing, the administrative department for patent in the State Council may, upon the request of the applicant at any time, make a substantive examination of the application; If the applicant fails to request substantive examination within the time limit without justifiable reasons, the application shall be deemed to have been withdrawn. The patent administrative department of the State Council may, when it deems it necessary, examine the application for a patent for invention on its own.