Production, sales (subject to meeting environmental requirements before production), construction, and installation of geosynthetics, traffic engineering materials, waterproof plastic products for engineering, and rail vehicle parts; distribution of metal materials; export business of self-produced products and technology, and import business of machinery, equipment, parts, raw and auxiliary materials, and technology required by the enterprise, except for commodities and technologies restricted or prohibited by the state. Manufacturing of household textile finished products; manufacturing of industrial textile finished products.