Dragon Brand, KNAUF, UsgBoral.

1. Dragon Brand: Dragon Brand light steel keel is a product of BNBM Group Building Materials Co., Ltd., a subsidiary of China National Building Materials Group, a state-owned enterprise. Longpai light steel keel has excellent quality and has won many honors including the National Quality Silver Medal (the highest award in the industry) and Beijing Famous Brand Product.

2. KNAUF: KNAUF Gypsum Board (China) Co., Ltd., formally established in 1997, is a building materials manufacturing company mainly engaged in gypsum board.

3. UsgBoral: UsgBoral Gypsum Building Materials Co., Ltd. was established on September 24, 2008. The company's business scope includes: design, production, and sales of desulfurized gypsum boards and caulking paste; sales of gypsum powder, natural gypsum boards and other gypsum boards, ceilings, walls and floor systems, and insulation systems (including: light steel keels, screws, paper tapes and caulking paste), industrial gypsum and related ancillary products, installation tools and parts; warehousing services (except hazardous chemicals and special regulations); sales of self-produced products; provision of technical consultation and product after-sales service; similar products to the above products are imported Export, wholesale, commission agency (except auction), and provide related supporting services, etc.