Manufacturing of distribution switch control equipment; Manufacturing of intelligent electrical equipment; Manufacturing of other household electrical appliances; Manufacturing of other non electric household appliances; Electric light source manufacturing; Manufacturing of lighting fixtures; Manufacturing of electrical accessories and other lighting fixtures for lamps; Electrical equipment manufacturing; Manufacturing of audio equipment; Installation services for stage lighting and sound equipment; Stage installation and construction services; Stage machinery design and installation services; Wholesale trade of goods (excluding licensed and approved goods); Retail trade of goods (excluding licensed and approved goods); Product information consulting services; Import and export of goods (excluding exclusive and controlled goods); Technology import and export; Manufacturing of specialized equipment for the production of lighting fixtures; Installation of lighting system; Lighting engineering design services; Lighting and lighting design services; Manufacturing and processing of hardware accessories