Manufacture of aluminum alloy wheels, manufacture of molds, manufacture of casting machinery, manufacture of specialized equipment for automotive parts; sale of self-produced products and provision of related services; metal surface treatment, machining and repair of mechanical parts, development and promotion of new technologies and processes for automotive parts, performance inspection and testing of aluminum wheels, computer system integration and services, computer repair and information consulting, computer software development and services; wholesale of chemical products and related products, and provision of related services; manufacture and retail of parts for automobiles, railway rolling stock, and aviation equipment; import and export of goods and technologies.