General projects: technical service, technology development, technology consultation, technology exchange, technology transfer, technology promotion; Landscaping engineering construction; General mechanical equipment installation services; Sales of signs for transportation and public administration; Sales of electronic products; Special equipment repair; Machinery and equipment sales; Machinery and equipment leasing; Parking service; Building materials sales; Professional design services; Sales of construction machinery; Sales of chemical products (excluding licensed chemical products); Electrical equipment sales; Import and export of goods; Technology import and export. (Except for the projects subject to approval according to law, independently carry out business activities according to law with the business license) Permitted projects: construction projects; Construction professional work; Construction project design; Construction labor subcontracting; The state trade regulates the import and export of goods. (For projects subject to approval according to law, business activities can only be carried out after approval by the relevant departments, and the specific business projects shall be subject to the approval documents or license of the relevant departments.) (Business activities of projects prohibited and restricted by national and municipal industrial policies shall not be engaged.)