DUOWEI Union Group Co., Ltd. is a manufacturer of eco-friendly building steelstructures and metal claddings and an integrated service provider of design andR&D, lean manufacturing, construction management, and international trade. It was founded in 1983 in Beijing, with USD 50 million of registered capital. DUOWEI has set up 6 R&D and manufacturing bases and subsidiaries in China, annually producing 300, 000 tons of steel structures for many types of buildings, 5, 000, 000 sq. M. Of eco-friendly building sandwich panels, 30, 000, 000 sq. M. Of prefabricated metal cladding boards, 3, 000, 000 sq. M. Of steel bar truss decks, and 4, 000, 000sq. M. Of construction areas per year. DUOWEI has also set up overseas branch esin Kazakhstan, Venezuela, Ethiopia, Malaysia and Mongolia. Its products are sold to over 50 countries and regions, which, in return, bring in more than USD800 million of annual sales revenue. DUOWEI has the service capability of professional design according to the technical standards such as American Standard and European Standard. DUOWEI steel structures and metal claddings have passed the American AISC and FM certification, EU CE and Russian GOST certifications, as well as the ISO9001quality management system, the ISO14001 environment management system, and the OHSAS18001 occupation health safety management system certification. DUOWEI has been awarded China's top 10 building steel structure & metal curtain wall sandwich panel industries. DUOWEI is constantly committed to eco-friendly building steel structures industry, and continuously adding values to customers, and always creating the mostvaluable steel structure construction system, and making itself a wellrespectedleader of the industry.