First of all, people lack knowledge about cars. In China, the popularity of cars has not been a few years, and many people's knowledge of cars is basically zero, which is what we all call Xiaobai. Even if they have some knowledge, they can only be regarded as the level of primary school students. If they have a modest learning attitude, they will make progress, but a group of people call themselves teachers and guide some white people who buy used cars.

Second, the market is chaotic. China's second-hand car market is immature and in a blind spot of supervision. There are many historical reports abroad, but they are not popular at home. Even many second-hand car dealers rejected this report for profit, and then issued a national standard on 20 15, which is considered a natural egg.

Third, profiteers. Cosmetic surgery is not only a Korean patent, but also a great ability of second-hand car dealers in China. The adjustment of odometer can only be regarded as cosmetic surgery, and the treatment of accident car and soaking car can only be regarded as the level of micro-plastic surgery. Then the top plastic surgery is to splice a car with a good front and a good rear. After processing, the appearance is completely invisible, but the frame is an important part to ensure the safety of the car. If it is cut and welded, it is equivalent to a broken bone of the human body.