Li Xin smiled and said: For example, when it comes to firewood, rice, oil and salt, there is no market differentiation. The rich need to eat, and the poor also need to eat. But if it is replaced by cars, it will be different. Many farmers have little income to begin with, and their families need to support one or two more. If you are a college student, you may even have trouble eating. Why would they buy a car?...