General projects: Research and development of new material technology; Sales of metal tools; Sales of non-metallic minerals and products; Sales of machinery and equipment; Sales of mechanical parts and parts; Sales of building decoration materials; Sales of daily-use ceramic products; Sales of building materials; Sales of molding materials for casting; Internet sales (except for the sale of goods that require a license); Mining machinery sales; Retail of hardware products; Import and export of goods; Technology import and export. (Except for projects subject to approval in accordance with the law, independently carry out business activities with a business license in accordance with the law)