Why does the police station still have the sign of the Criminal Police Squadron?

The police station has a criminal police team. The reason why the police station hangs the sign of the Criminal Police Squadron is because the police station has a criminal police team. The full name of the police station is the branch of the police station. It does not specifically refer to the police station of the public security organ. Since the public security police station has the closest relationship with the lives of the people, it is customary for the people to use it as the abbreviation of the public security police station.