Construction labor subcontracting; Construction engineering construction. General items: Metal product research and development; Mechanical equipment research and development; New material technology research and development; Home appliance research and development; Internet of Things technology research and development; Construction metal accessory manufacturing; Lightweight building material manufacturing; Metal structure manufacturing; Hardware product manufacturing; Thermal and acoustic insulation material manufacturing; General component manufacturing; Special equipment manufacturing (excluding licensed professional equipment manufacturing); Intelligent basic manufacturing equipment manufacturing; Intelligent instrument manufacturing; Industrial automatic control system device manufacturing; General equipment manufacturing (excluding special equipment); Artificial intelligence application software development; Cloud computing equipment technical services; Electronic components and electromechanical component equipment manufacturing; Testing machine manufacturing; Integrated circuit manufacturing; Door and window processing and manufacturing; Special equipment repair; Home appliance manufacturing; Professional design services; Engineering technical services (excluding planning management, survey, design, and supervision); Software development; Technical services, technical development, technical consultation, technical exchange, technology transfer, and technology promotion; Mechanical and electrical equipment sales; Intelligent power distribution and control equipment sales; Labor services (excluding labor dispatch); Domestic freight forwarding; Container leasing services; Technology import and export; Goods import and export; Engineering management services; Construction metal accessory sales; Lightweight building material sales; Metal structure sales; Building materials sales; Thermal and acoustic insulation material sales; Hardware product wholesale; Hardware product retail; Construction machinery and equipment leasing; Electronic and mechanical equipment maintenance (excluding special equipment); Leasing services (excluding licensed leasing services); Housing leasing; Organization of cultural and artistic exchange activities; Marketing planning; Information consulting services (excluding licensed information consulting services); Corporate image planning; Photography and video production services; Industrial engineering design services; Advertising design and agency; Advertising production; Graphic design; Socio-economic consulting services; Cultural and entertainment broker services; Road freight transport for vehicles with a total mass of 4.5 tons or less (excluding network freight and dangerous goods).