Manufacture of wires, cables, and monitoring equipment; sales and maintenance of electromechanical products; sales of metal materials (excluding precious and rare metals), coke, plumbing equipment, hardware products, electrical equipment, general equipment, radio and television equipment (excluding satellite ground receiving facilities), energy-saving equipment, and door and window profiles; self-operated and agent import and export business of various commodities and technologies (excluding those restricted or prohibited by the state); construction of building intelligent engineering; automobile repair; and agency of motor vehicle insurance services.