R&D, installation, manufacturing and sales of industrial automatic control system devices; Internet information service business in the second type of value-added telecommunications business (operated according to the approved scope and period of the "Value-Added Telecommunications Business License"); Production and installation of steel structure parts; Stamping Processing and sales of parts; Installation of mechanical and electrical equipment, air conditioning equipment, and pipeline equipment; Sales of hydraulic and pneumatic power machinery and accessories, electrical machinery, wires and cables; Sales and installation of fire-fighting equipment and equipment; Sales of resin composite materials, fiberglass composite materials, and sporting goods; Clothing manufacturing and sales; Computer application software research, development, and sales; Information technology consulting services; Scientific and technological information consulting services; Advertising design, production, and distribution (except fixed-form print advertising); Self-operated and agent import and export of various commodities and technologies Business (except for goods and technologies that are restricted by the state or prohibited from import and export). (Those that involve qualifications in the business scope are operated with qualification certificates) (Projects that require approval according to law can only be carried out with the approval of relevant departments)