With the continuous growth of China's economy and the improvement of people's living standards, the traditional consumption level is gradually promoted under the guidance of the government and the promotion of the market. The automobile market is transformed from purchase management to use management, and the circulation of second-hand cars is increased, and the market is further expanded.

In this context, second-hand cars, as special non-standard products, cannot be separated from product testing and certification standards to ensure fair, fair and open trading. Therefore, in the face of the increasingly expanding second-hand car market, both the traditional car dealers and the second-hand car e-commerce companies are seeking the assessment and testing with technical clearance and guarantee in place and all the professional identification conclusions based on facts, which highlights the importance of vehicle identification and testing.

GB/T 30323-2013 and T/CADA 18-2021 are for the purpose of regulating the evaluation behavior of second-hand cars, promoting the healthy development of the automobile market, creating a fair and just consumption environment for second-hand cars, and protecting the legitimate rights and interests of consumers.

NOA follows the standards of BG/T 30323-2013 and T/CADA 18-2021, and in accordance with the standard detection and identification process formulated by NOA, it carries out the detection of 270 subdivided items of 6 major items for used cars, so as to achieve full transparency of car conditions.