Hardware product research and development, mechanical equipment research and development, technical services. Technology development, technical consultation, technical exchange, technology transfer, technology promotion, electronic components manufacturing, electronic components wholesale, capacitors and their supporting equipment manufacturing, capacitors and their supporting equipment sales, other electronic device manufacturing, electronic components retail; Display device system display device sales, computer hardware and software and peripheral equipment manufacturing, computer soft and hard slide and billing equipment manufacturing, slide and projection equipment sales and auxiliary equipment retail: sales, audio equipment manufacturing: audio equipment sales, mobile terminal equipment manufacturing, mobile terminal equipment sales, hardware products manufacturing, hardware products wholesale, mold manufacturing, mold sales: electrical accessories manufacturing: electrical accessories sales: electronic product sales, mechanical equipment sales, investment activities with their own funds, technology import and export, Import and export of goods. (Except for projects that require approval according to law, and independently carry out business activities according to law on the basis of business license)