Check Certifications and Qualifications: Ensure the supplier has relevant certifications and qualifications, such as ISO certification, FDA approval, etc.
Sampling Testing: Regularly conduct sampling testing of products to ensure they meet quality standards.
Build Good Relationships with Suppliers: Establishing stable cooperation with suppliers can help you better control product quality.
Regular Audits: Regularly audit the supplier's production processes and quality control measures to ensure they meet your standards.
Utilize Third-Party Testing Agencies: Consider using third-party testing agencies to test products and ensure quality.