Sales of fire-fighting equipment; sales of metal products; manufacturing of security equipment; manufacturing of metal products for safety and fire-fighting; engaged in technology development, technical consulting, technical services, and technology transfer in the field of network technology; R&D, production, and sales: auto parts, motorcycle parts, electromechanical products, mechanical equipment, printing equipment and equipment, environmental protection equipment, and electrical equipment; import and export of goods and technology [Projects subject to approval according to law can only be operated after approval by relevant departments]. .