It always belongs to real estate intermediary services, which are divided into real estate consulting (business activities that provide services such as laws, regulations, policies, information and technology for the parties engaged in real estate activities), real estate appraisal (activities that measure and judge the value of real estate at a specific time) and real estate brokerage (activities that provide professional services such as real estate intermediary and agency to clients in order to promote other people's real estate transactions).
Of course, you can also go to the real estate administration trading office for free consultation on related matters.