Production and sales of digital audio and video codec equipment (MP3, CARA/V) and their accessories and peripheral supporting parts, digital recorders (digital multimedia players) and their accessories and peripheral supporting parts, satellite navigation and positioning receiving equipment and key components (excluding restricted items), wireless LAN (WAN) equipment, IP data communication system manufacturing (network multimedia terminals), portable microcomputers (tablets), intelligent children’s learning robots, vehicle driving recorders, projectors, TV set-top boxes. Engaged in research and development of portable multimedia players, computer peripheral products, electronic dictionaries, and satellite navigation system electronic products. Self-owned housing rental, production and sales of e-books and electronic dictionaries, and wholesale and import/export of similar products (excluding state-managed trade commodities, and commodities subject to quota or license management shall be handled according to relevant state regulations).