Secret of car washing profit: Why does someone open a car washing shop with an annual income of tens of millions?

It is true that the prosperity of the automobile industry has driven the development of car washing, maintenance, insurance, petrochemical and other industries, but the market development trend will never let any industry down. The next group of people fell, and another group of people rose up. During this period, people kept asking whether this industry was good or not, and did the industry make money or not.