Licensed project: Construction project construction; Construction labor subcontracting; Construction professional operations (projects that require approval by law can only be carried out after approval by relevant departments, and specific business projects are subject to the approval results) General projects: Technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; Technology promotion and application services; Health consultation services (excluding diagnosis and treatment services); Elderly care services; Information consulting services (excluding licensed information consulting services); Air pollution control; Sales of building materials; Sales of electronic products; Sales of specialized environmental protection equipment; Sales of security equipment; Sales of Class I medical devices; Sales of Class II medical devices; Sales of agricultural and sideline products; Food sales (only selling pre packaged food); Manufacturing of lightweight building materials; Mechanical manufacturing for construction projects (except for projects that require approval according to law, business activities can be carried out independently based on the business license in accordance with the law)