The sales model of automobiles in China is that dealers buy cars from the automobile factory and then sell them to consumers. Dealers are equivalent to wholesalers. The sales statistics of automobile factories are all the quantities sold to dealers, and the terminal sales are the quantities sold by dealers to consumers. It is the number of the actual purchase of cars after the DMV statistics because the manufacturer can wholesale a large number of cars to dealers, so the sales announced by the manufacturer is only for reference, can not reflect the actual purchase situation, the terminal sales can better reflect the actual situation of the car market