2. Price inversion means that the sales price of products of downstream merchants such as secondary dealers, tertiary dealers and sales terminals is lower than the normal delivery price of primary dealers, even lower than the lowest ex-factory price of manufacturers. On the surface, price inversion means that downstream distribution customers sell at a low price at a loss. In fact, it is because the downstream distribution customers have discounted some sales policies given by manufacturers or upstream distributors, and maintained the overall profit.