Qingzhou Guanghui Chemical Factory in Shandong Province was established in 1998, specializing in the production of industrial-grade trisodium phosphate, disodium hydrogen phosphate, pentasodium phosphate, sodium dihydrogen phosphate, potassium dihydrogen phosphate, potassium hydrogen phosphate, sodium hexametaphosphate, and sodium acetate. It is a designated manufacturer of phosphorus chemical and phosphate series products, providing a full range of production, supply, and sales services in Shandong Province.