Network security information consultation; Information system security service; Software technology promotion services; Network information technology promotion service; Electronic equipment recycling technology consulting services; Power electronics technical services; Computer technology transfer services; Wholesale of TV equipment and accessories; Retail of household audio-visual equipment; Wholesale of household appliances; Import and export of goods (except for goods exclusively controlled by the state); Technology import and export; Manufacturing of refrigeration and air conditioning equipment; Sound equipment manufacturing; TV set manufacturing; Film and television recording and playback equipment manufacturing; Plastic pellet manufacturing; Research and development of electronics, communication and automatic control technology; Other wood processing; Commodity wholesale trade (except for licensed and approved commodities); Retail trade of commodities (except for licensed commodities); Internet commodity retail (excluding licensed and approved commodities)