We have a group of professional technicians engaged in the cold forming production of piston rings with large cylinder diameters, and they are responsible for the technical quality assurance work of the company. From the raw materials entering the factory to the products leaving the factory, modern scientific management methods are adopted to monitor the quality of each link and prevent defective products from flowing to the next process. The company implements a strict three-inspection system: self-inspection, mid-inspection and final inspection, and keeps original tracking records to ensure that every piston ring leaving the factory is traceable.