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