Sub product sales; Software sales; Sales of optoelectronic devices; Sales of digital video surveillance systems; Integrated circuit sales; Artificial intelligence universal application system; Sales of artificial intelligence hardware; Sales of mechanical equipment; Research and development of emerging energy technologies; Research and development of new material technology; Sales of electronic specialized equipment; Sales of communication equipment; Retail of daily household appliances; Sales of household audiovisual equipment; Internet data services; Domestic trade agency; Sales of electronic components and electromechanical component equipment; Retail of electronic components; Sales of power electronic components; Sales of electrical and mechanical equipment; General component manufacturing; Wholesale of hardware products; Manufacturing of film and television recording and playback equipment; Manufacturing of audio equipment; Television manufacturing;