When sourcing GWM parts, it is critical to distinguish between Original Equipment Manufacturer (OEM), Original Equipment Supplier (OES), and Aftermarket (AF) parts. OEM parts should feature the GWM holographic security label and unique QR codes for traceability. For aftermarket components, ensure the supplier holds IATF 16949 certification, which is the global quality management standard for the automotive industry. Always request material analysis reports for critical components like engine valves or brake pads to ensure they meet the tensile strength and heat resistance requirements of the original vehicle specifications.