Technical services, technology development, technology consultation, technology exchange, technology transfer, technology promotion; power electronic component manufacturing; power electronic component sales; auto parts and accessories manufacturing; auto parts research and development; auto parts retail; auto parts wholesale; motorcycle parts manufacturing; motorcycle and parts retail; electronic components manufacturing; electronic components wholesale; electronic components retail; distribution switch control equipment manufacturing; distribution switch control equipment sales; distribution switch control equipment research and development; power transmission and distribution and control equipment manufacturing; electronic product sales; bicycles Manufacturing of spare parts; research and development of mechanical equipment; sales of mechanical equipment; manufacturing of special equipment (excluding manufacturing of licensed professional equipment); manufacturing of plastic products; sales of plastic products; mold manufacturing; mold sales; hardware product manufacturing; hardware product research and development; hardware product wholesale; hardware product retail; metal product research and development; metal product sales; household appliance spare parts sales; household appliance manufacturing; new energy prime mover equipment sales; new energy vehicle electrical accessories sales; electronic special material sales; new material technology research and development; non-residential real estate leasing; goods import and export; technology import and export.