Manufacture of glass fibers and products. Sale of glass fibers and products. Manufacture of high-performance fibers and composite materials. Sale of high-performance fibers and composite materials. Manufacture of metal materials. Sale of metal materials. Manufacture of plastic products. Sale of plastic products. Manufacture of hardware products. Retail of hardware products. Manufacture of new types of building materials (excluding hazardous chemicals). Sale of building materials (excluding sand and gravel). General machinery installation services. Construction engineering. (Projects that require approval according to law must be carried out after obtaining the relevant approvals)