General business items are: technological development of computer software and hardware; R&D and sales of home audio-visual systems and smart home products; domestic trade (except for items that require approval before registration according to laws, administrative regulations, and decisions of the State Council); import and export of goods and technology (except items prohibited by laws and administrative regulations; items restricted by laws and administrative regulations must obtain a license before they can be operated). , the licensed business projects are: technology development, production and sales of electronic products