The company regards quality as the foundation of the company's survival. It has established a high-efficiency and high-quality product research and development team , focusing on tire technology RD ; and applying new materials , with independent research and development capabilities for a full range of products. The company's products have passed the national CCC product certification , ISO/IATF16949S international acid system certification , DOT certification of the United States Department of Transportation , ECE certification of the Economic Commission for Europe , Brazil IN-METRO certification , GCC certification in the Middle East , European wetland noise certification and Nigeria SONCAP certification. ...