The responsibilities are as follows: 1. Responsible for product quality control from sample to mass production, seeking to improve product quality through testing, control and improvement process; 2. Responsible for solving quality problems in the production process, handling quality abnormalities and quality improvement; 3. Follow up the quality of products, handle customer complaints and provide solutions; 4. To formulate various quality-related inspection standards and documents; 5. To guide the quality improvement of the factory, analyze and improve the bad materials.