Manufacturing and Sales: one、 pair、 Multilayer circuit boards( Business activities can only be carried out after obtaining approval from the environmental protection department) and electronic product development; Technology import and export, Import and export of goods; Road freight transport( Does not contain dangerous goods); Electronic special equipment manufacturing, Electronic component manufacturing, Sales of special electronic equipment, Electronic components retail, Sales of power electronic components, Sales of electronic components and electromechanical components, Electronic components and electromechanical assembly equipment manufacturing, Electronic measuring instrument sales, Electronic measuring instrument manufacturing, Machinery and equipment rental, Non-residential real estate rentals, Housing rental, Technical Services、 Technology Development、 Technical Consulting、 Technical Exchange、 Technology Transfer、 Technology Promotion, Information consulting services( No licensing information consulting services), Software Development。( Projects that require approval according to law, Business activities can only be carried out after approval from relevant departments)