General business items are: supply chain management, Doors and Windows、 Metal roofing、 Light steel structure、 Energy-saving and environmentally friendly complete design and construction; Electronics,digital products, communications equipment, Sales of mobile phones and accessories, mobile phone cases、 R&D and sales of intelligent electronic equipment, Computer software and hardware development; E-commerce business; Hardware products, Craft gifts( Except ivory and its products)、 Sales of electromechanical equipment and accessories; Metal products, plastic products, Sales of home appliances; Automation equipment accessories, Mechanical equipment R&D and sales。,The licensed business items are: Complete design and construction of curtain walls、 Engaged in the research and development of buildings and building curtain walls、 design、 purchase、 Production、Install、 construction、 Operations and Maintenance、 Management and technology development in the field of building curtain wall decoration、 Technical Services、 Transfer of results、 Design Consulting; Curtain wall inspection、 Identification、 repair、 maintainance、 replace、 Cleaning。