General business items are: electronic components, integrated circuits, optoelectronic products, semiconductors, solar products, instrument accessories, digital TV playback products and communication products technology development and sales; Development and sales of dryers, industrial dehumidifiers, purification equipment, mechanical and electrical machinery, refrigeration equipment; Research and development of intelligent transportation products, installation, development and sales of road traffic facilities; Technical development and sales of conference public broadcasting equipment, avionics equipment and test equipment; Dealing in the import and export of goods and technologies; Domestic trade (excluding exclusive, exclusively controlled and exclusively sold commodities); General machinery, instrumentation, radio and external equipment, online games, multimedia products system integration and wireless data products (excluding restricted items) technology development and sales; R&D and sales of wireless access equipment, GSM and CDMA wireless repeater equipment