Yashima belongs to the wholesale and retail industry. Its main industry is the wholesale industry. Its service fields include the wholesale, import and export, commission agency (except auction) and other related supporting businesses of railway vehicle parts, machinery and equipment for railway vehicles, machinery and equipment for railway track maintenance, electronic connectors and harness products; Provide trade consulting services, technical consulting and after-sales services for the above products; International trade, entrepot trade, trade between enterprises in the region and trade agency in the region; Simple commercial processing in the zone (commodities that do not involve state-owned trade management, commodities that involve quota, license management and special regulations management shall be handled in accordance with the relevant provisions of the state).