GUIZHOU CHANHEN CHEMICAL CORPORATION (hereinafter referred to as CHANHEN) Our production base is located in Guizhou province Fuquan City, with our phosphorus mine located in Guizhou Province, Weng'an county. The production and marketing capacities are more than 400 thousand tons/ year, annual sales revenue is more than 1 billion RMB. After decades of development, the company has been formed to a circular economy industrial group based on phosphorus chemical industry, including mining, phosphate production, phosphorus chemical technology innovation, associated resource development& utilization, phosphorus gypsum building materials, technical services, product sales.