Qingzhou Guanghui Chemical Factory in Shandong Province was established in 1998, specializing in the production of industrial-grade sodium tripolyphosphate, sodium hydrogen phosphate, sodium dihydrogen phosphate, potassium dihydrogen phosphate, potassium hydrogen phosphate, sodium hexametaphosphate, and sodium acetate. It is a designated manufacturer for the phosphorus chemical and phosphates series in Shandong Province, offering a one-stop service of production, supply, and sales.