Design and sales of electronic products; Processing and sales of metal materials, mechanical equipment, and automation equipment; Sales of packaging materials, hardware products, insulation materials, purification products, silk screen products, chemical products (excluding hazardous chemicals, precursor chemicals, and monitoring chemicals), computers and accessories, wires and cables, mold accessories, instruments and meters, labor protection supplies, office supplies, and building materials; Import and export business of goods and technology. (Projects that require approval according to law can only be operated with the approval of relevant departments)