During the production of piston rings-piston ring set, GUANGZHOU HEARTEN AUTO PARTS CO,LTD. divides the quality control process into four inspection stages. 1. We check all incoming raw materials before usage. 2. We perform inspections during the manufacturing process and all manufacturing data are recorded for future reference. 3. We check the finished product according to the quality standards. 4. Our QC team will randomly check in the warehouse before shipment. . We differentiate ourselves by enhancing the awareness of HEARTEN brand. We find great value in enhancing brand awareness on social media platforms. To be most productive, we establish an easy way for customers to connect to our website seamlessly from the social media platform. We also quickly respond to negative reviews and offer a solution to the customer's problem.. We pride ourselves with outstanding services that make our relationship with customers as easy as possible. We are constantly putting our services, equipment, and people to the test in order to better serve customers at HEARTEN AUTO PARTS. The test is based on our internal system which proves to be high efficiency in the improvement of service level..