Zhangjiakou Boxin Industrial and Trading Co., Ltd., is engaging in the research and development, the production and sales of bentonite and the related series of products. In the past ten years, the company has oppupied a larger share of the domestic market, with the sample projects of the Bird Nest Stadium, the National Swimming Center, CCTV New Tower, the suburban railways and subways, and export to North Africa and Southeast Asia. Reach the annual turnover of 20,000,000 yuan.