The professional standards that engineering cost consulting enterprises should follow in their practice activities include: ① implementing national macroeconomic policies and industrial policies, observing national and local laws, regulations and relevant provisions, and safeguarding the interests of the country and the people; (2) accept the business guidance of the self-regulatory organization of the engineering cost consulting industry, consciously abide by the rules and regulations of this industry, and actively participate in the business activities of this industry organization; (three) to carry out business in accordance with the qualification grade and service scope stipulated in the qualification certificate of the engineering cost consulting unit, and only undertake competent work; (4) Have the ability to practice independently and working conditions, serve customers wholeheartedly, and gain the trust and praise of customers with high-quality consulting results and excellent service; ⑤ Conduct business according to the principles of fairness, justice, honesty and credit, earnestly perform contracts, independently conduct business activities according to law, and strive to improve economic benefits; ⑥ Participate in market competition with quality and reputation, and put an end to disorderly and vicious competition; Do not use the special relationship with administrative organs, social organizations and other economic organizations to engage in commercial monopoly; ⑦ People-oriented, encourage employees to update their knowledge, master advanced technical means and business knowledge, and take effective measures to organize and urge employees to receive continuing education; (8) Not accepting the entrustment of both parties to conduct judicial expertise consulting business and solve economic disputes; Pet-name ruby shall not obstruct the client to entrust other engineering cost consulting units to participate in consulting services; * * * To provide services with engineering cost consulting units, they shall have a clear division of labor and cooperate closely, and shall not damage the interests and reputation of other units; Attending to keep the technical and commercial secrets of customers, except that the customers have agreed in advance and the state has otherwise stipulated.