Special equipment sales; metal product sales; metal material sales; insulation material sales; plastic product sales; anti-corrosion material sales; thermal and sound insulation material sales; hardware product retail; hardware product wholesale; labor services (excluding labor dispatch); construction decoration, water heating pipeline parts and other construction metal product manufacturing (branch operations); new building material manufacturing (excluding hazardous chemicals) (branch operations); plastic product manufacturing (branch operations); new material technology research and development; hardware product manufacturing (branch operations); road cargo transportation for ordinary freight vehicles with a total mass of 4.5 tons and below (excluding network freight and dangerous goods); import and export of goods; import and export of technology. Licensed items: special equipment manufacturing (branch operations); construction engineering construction; specialized construction operations.