What does the principle of patent prohibition and repeated authorization mean?

The principle of prohibiting repeated authorization means that only one patent right can be granted to the same invention and creation. However, China is allowed to apply for an invention patent and a utility model patent at the same time for the same invention-creation, which requires the following conditions: the same applicant applies on the same day and declares in the application documents that he applies for an invention patent and a utility model patent at the same time; The invention application meets the authorization conditions, and the patent right for utility model that needs to be obtained first has not been terminated, and the applicant can only authorize it if he renounces the patent right for utility model.