Marine engineering key supporting system development; Bearing sales; Research and development of Marine engineering equipment; Sales of Marine engineering equipment; Ship sales; Machinery and equipment sales; General equipment repair; Mechanical and electrical equipment sales; Electrical equipment repair; Special equipment repair; Conference and exhibition services; Digital creative products exhibition service; Organizing cultural and artistic exchange activities; Ship towing service; Marine environmental services; Marine services; Technical service, technology development, technology consultation, technology exchange, technology transfer, technology dissemination; Information consulting services (excluding licensed information consulting services); Labor service (excluding labor dispatch); Human resource services (excluding job intermediary activities and labor dispatch services); Furniture sales; Sales of household appliances; Timber sales; Auto parts wholesale; Auto parts retail; Water transport equipment spare parts sales; Import and export of goods; Residential interior decoration. (Except for the items subject to approval according to law, independently carry out business activities according to law with the business license) Permitted items: Ship modification; Ship repair.