In order to ensure product quality, the company employs professional chemical analysis talents from major universities to form a special chemical raw material testing team, adopts various advanced testing methods, and configures high-end testing equipment imported from the United States and Japan. A strict raw material control system is established from the basic index testing of raw materials, small sample tests, performance evaluation, to sampling, feeding, and warehousing. And a qualified supplier selection group is formed by the technical department, the manufacturing department and the purchasing department, and the high-quality raw materials are introduced from the supply partners in many countries. Establish a strict product quality control system from the selection of procurement suppliers, raw material inspection and control, and process monitoring to ensure that we provide customers with high-quality products.