Manufacturing of metal chains and other metal products; manufacturing of auto parts and accessories; research and development of auto parts; retail of auto parts; wholesale of auto parts; manufacturing of motorcycle parts; research and development of motorcycles and parts; retail of motorcycles and parts; wholesale of motorcycles and parts; casting machinery manufacturing; casting machinery sales; mold sales; mold manufacturing; hardware product manufacturing; hardware product wholesale; hardware product research and development; import and export of goods; technology import and export.