Is Jinan's real estate agency formal?

Informal Nowadays, many real estate agents are particularly informal and unreliable. There are many contradictions and disputes in the houses introduced, and this kind of real estate agency is unreliable and easy to close down. You don't know who to look for then, and the agency fee is particularly expensive and the service is particularly poor. If you rent a house and then look for them, they will shirk everything and the service is poor, so I still find some real intermediary companies to rent a house.