Manufacturing and sales of power tools, electrical accessories, motor accessories, auto parts, motorcycle accessories, mechanical equipment, and hardware; processing and sales of copper and non-ferrous metals (excluding smelting); sales of ladders and accessories, trolley accessories, shelves, scaffolding, special equipment for motors, metal products, and plastic products; various project investments and consulting services; product research and development and technical services; import and export of goods, and import and export of technology