Mold manufacturing; mold sales; plastic product manufacturing; plastic product sales; auto parts wholesale; auto parts retail; auto parts research and development; motorcycle parts manufacturing; motorcycle and spare parts retail; motorcycles and spare parts wholesale; motorcycle and parts research and development; mechanical equipment sales; mechanical equipment research and development; hydraulic power machinery and component manufacturing; synthetic material manufacturing (excluding hazardous chemicals); synthetic material sales; fireproof sealing material production; fireproof sealing material sales; electronics, mechanical equipment maintenance (excluding special equipment); technology import and export; goods import and export.