The business scope includes general projects: Engineering and technical research and test development; New material technology promotion services; Manufacturing of industrial textile products; Sales of industrial textile products; Manufacturing of gas and liquid separation and purification equipment; Sales of gas and liquid separation and purification equipment; Manufacturing of new membrane materials; Research and development of new material technology; Domestic trade agent( In addition to the items subject to approval according to law, the business license shall be used to carry out business activities independently according to law) licensed items: Import and export of goods; Technology import and export.