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