Production of Class II medical devices, production of medical masks, production of protective equipment for medical staff (Class II medical devices), production of sanitary products and disposable medical supplies General projects: R&D, production and sales: Beidou navigation application products, computer software and hardware, communication equipment (excluding satellite TV broadcasting ground receiving facilities), auto parts, motorcycle parts, general machinery molds, first-class medical equipment; sales: chemical products (excluding hazardous chemicals), mechanical and electrical products, textile products, office supplies ; Using own funds for project investment, investment information consultation, wholesale of industrial products, wholesale of daily necessities; real estate development; import and export of goods, leasing of own houses, property management, sales of second-class medical devices, wholesale of medical masks, wholesale of protective equipment for medical staff, sales of sanitary products and disposable medical supplies, wholesale of sanitary products