Is the public security law enforcement announcement the case over?

No.

It just indicates that it has entered the administrative penalty stage.

If the party fails to perform voluntarily and refuses to perform after being urged by the administrative department, but the administrative department has applied to the people's court for compulsory execution in accordance with the law; if it involves the need to transfer the case to the relevant department for criminal liability or disciplinary action, the case shall be closed before closing. It has been transferred according to law. In law enforcement practice, if after the case is filed but before the penalty decision is made, the illegal behavior has been corrected and the illegal status has been eliminated, and the consequences of the violation are minor and administrative penalties may not be imposed according to law, the case can be closed; after the case is filed, the administrative penalty cannot be implemented due to the disappearance of the responsible party. And if the case is transferred to the jurisdiction, the case can also be closed.