What is the charging basis of Tianjin housing rental management fee?

Housing rental management fees are charged by the Housing Rental Management Office of the Real Estate Bureau according to the relevant approval of the local government, and the standard is approved by the price department. But this crime has nothing to do with the police station. The police station is only registered for public security. If it is charged by the police station, it is overcharging. In principle, it shall be borne by the lessor, but it can also be negotiated.