General items: Internet sales (except for sales of goods requiring licensing), personal Internet live broadcasting services, literary and artistic creation, sales of metal materials, sales of building materials, metal structure manufacturing, sales of high-quality special steel materials, wire and cable business, production of bearing steel products, light building materials sales, non-ferrous metal calendering processing, and sales of building decoration materials. Sales of non-metallic minerals and products, sales of steel bar products for construction, retail of hardware products and sales of metal structures (except for projects subject to approval according to law, business activities shall be carried out independently according to law with business licenses)