Metal structure manufacturing; Metal structure sales; Non-ferrous metal rolling processing; Lightweight building material manufacturing; Lightweight building material sales; Building metal accessory manufacturing; Building metal accessory sales; Building material sales; New building material manufacturing (excluding hazardous chemicals); Door and window manufacturing and processing; New material technology research and development; Traffic and public management metal sign manufacturing; Road cargo transportation for vehicles with a total mass of 4.5 tons or less (excluding network freight and dangerous goods); Domestic trade agency.