I always get short messages from the city bureau. How can I turn it off?

Just turn off the SMS notification in the notification bar in the settings.

This kind of message may be a goodwill reminder message sent by the government department, usually sent in his area. You have never disclosed the number, but the number you run is run by three major operators and backed by the police. This is not fraud, so it may be a goodwill reminder message sent by the government.