"Taiyuan Property Management Regulations" has been promulgated, but which is the specific regulatory department? Which department should I complain to?

It should be the Property Management Office of Taiyuan Real Estate Administration.

This is the function of the Property Office found on the website of the Housing Authority:

Responsible for guiding and supervising the city's property management; Participate in the construction planning and acceptance of residential quarters; Supervision and management of property management bidding; Responsible for supervising the collection and use of facilities and equipment maintenance funds used in residential areas; Responsible for the qualification examination, annual examination and temporary autonomy approval of property management enterprises; Know and supervise the establishment of the owners' committee in the property area; To guide the work of the Municipal Property Management Association.