When the State Intellectual Property Office issues a patent certificate, does this act constitute an administrative license?

No, this should be an administrative confirmation act.

Administrative confirmation is the identification, screening, and verification of certain legal facts, legal relationships, rights, qualifications, or legal status by administrative entities in accordance with the provisions or authorization of laws and regulations, ex officio or upon the request of the parties. Administrative act to prove and declare. This is obviously the case when a patent is granted and a patent certificate is issued.

Administrative licensing refers to the administrative subject granting or confirming the administrative counterparty to engage in certain activities through the issuance of permits, licenses, etc. based on the application of the administrative counterparty and subject to legal review under circumstances generally prohibited by law. A specific administrative act with legal qualifications or legal rights for an activity.

Legal basis: Article 2 of the "Administrative Licensing Law of the People's Republic of China"

The term "administrative licensing" as used in this law refers to the administrative licensing of administrative organs based on the approval of citizens, legal persons or other organizations. The application, after review in accordance with the law, will be allowed to engage in specific activities.

In other words: If the act of patent authorization and issuance is an administrative license, it means that you are not allowed to engage in the work without a patent certificate. This understanding of patent rights is obviously wrong.