Licensed Projects: Construction project construction, General contracting of housing construction and municipal infrastructure projects, Construction Engineering Design, Power transmission、 powered by、 Installation of receiving power facilities、 Maintenance and testing, Professional construction work, Building demolition work( Except blasting operations), Construction labor subcontracting( Projects that require approval according to law, Business activities can only be carried out after approval from relevant departments, The specific business items are subject to the approval results.) General Projects: Foreign contracting projects, Engineering Management Services, General mechanical equipment installation services, Building materials sales, Refrigeration、 Air conditioning equipment sales, Machinery and equipment rental, Import and export of goods( Except for projects that require approval according to law, Carry out business activities independently in accordance with the law with a business license)