General business items include: research, development, sales, repair, and services of communication equipment, information equipment, computers and peripherals, satellite communication and navigation equipment, electromechanical equipment, instruments, meters, electronic components, storage equipment and related software, power supply maintenance and management systems; development, sales, maintenance, and services of communication information software; testing and metrology services; research, development, and sales of mobile phones and handsets; design, research, development, and sales of integrated circuits and chips; import and export business (handled in accordance with the import and export enterprise qualification certificate issued by the Municipal Trade Development Bureau). Licensed business items include: motor vehicle parking services; production of communication equipment, information equipment, computers and peripherals, satellite communication and navigation equipment, electromechanical equipment, instruments, meters, electronic components, storage equipment and related software, power supply maintenance and management systems, mobile phones and handsets.