What is the subsidy standard for property management companies by developers?

Need to negotiate. In general, developers use their own property management companies. This seems to save money, but some of its problems are easy to deal with. It is troublesome and difficult to control the key to other units. Make reports, employee salaries, benefits, office equipment, tools, daily management fees, maintenance fees, reasonable profits, etc. There are no specific standards, we need to talk about them. Or next to the square. 6- 10 yuan/m2.