Strict supplier management: select certified suppliers, conduct regular supplier audits, and ensure the quality of raw materials. Production process control: Implement comprehensive quality management, and conduct quality inspection and control at every stage from raw material storage to finished product delivery. Aging test and screening: Perform aging test and screening on key components to eliminate potential defective products. Batch management: Use advanced batch management system to ensure that each batch of products can be traced back to raw materials and production process.