Permitted items: import and export of goods; Technology import and export. (For projects subject to approval according to law, business activities can only be carried out after approval by relevant departments, and specific business projects shall be subject to approval documents or licenses of relevant departments.) General projects: sales of construction machinery; Machinery and equipment sales; Machinery parts, spare parts sales; Sales of electronic components and electromechanical components; Sales of power facilities and equipment; General mechanical equipment installation services; General equipment repair; Special equipment repair; Leasing services (excluding licensed leasing services); Handling services (except dangerous goods and special provisions); Information consulting services (excluding licensing information consulting services); Conference and Exhibition services; Information system integration services. (Except for projects subject to approval according to law, independently carry out business activities according to law with business license)