Distribution: ferrous and non-ferrous metal materials, ore powder (no storage), iron concentrate powder (no storage), building materials (excluding lime, sand and gravel), refractory materials, chemical and electrical materials (except for flammable and explosive products that need to be reported to the state for approval), household appliances, motorcycles, bicycles and accessories; steel pipe manufacturing; mechanical processing, metal structure processing; loading and unloading; buckle scaffolding manufacturing, sales and leasing; round Lathe processing of plates and oil support jackscrews; import and export of goods (except for goods and technologies that are restricted by national companies or prohibited from import and export); processing of prestressed concrete steel and PC rods (produced with an environmental protection license, and are not allowed to engage in business activities restricted or prohibited by the provincial industrial policy); warehousing (except for the first category of precursor chemicals and flammable and explosive dangerous chemicals); environmental protection technology development*