Dr. Cha's testing and certification is quite reliable. This third-party testing organization is an independent testing organization. Through the systematic analysis of the historical data of vehicles, Dr. Cha can restore the real history of vehicle condition, improve the long-standing problem of asymmetric information of used car trading, improve trading efficiency and help people guard against trading risks. As a "Xing" certification testing institution in china automobile dealers association, Dr. Cha participated in the formulation of national standards and group standards for used cars, and was the first testing institution in the industry to publicize and implement standards for accident cars, soaking cars and burning cars based on national standards and group standards.