Special ceramic product manufacturing; Furnace, melting furnace and electric furnace manufacturing; Intelligent instrument and meter manufacturing; Refractory material production; Mechanical parts and components processing; Mechanical and electrical equipment manufacturing; Metal material manufacturing; Basic chemical raw material manufacturing (excluding manufacturing of hazardous chemicals and other licensed chemicals); Precious metal smelting; Rare and rare earth metal smelting; Resource recycling technology research and development; Chemical product sales (excluding licensed chemical products); Functional glass and new optical material sales; Mechanical equipment leasing; Non-residential real estate leasing; Road freight transport for general cargo vehicles with a total mass of 4.5 tons or less (excluding network freight and dangerous goods); Import and export of goods.