First of all, there are so many departments that can check up on you. Simply put, anyone who wears a uniform can give you trouble. As for how much you want to prepare, I suggest that you make a dining car. The glass shelf is nothing more than a tricycle. You can buy a second-hand shelf or find someone to do it yourself. The whole set is capped at 5,111 yuan, including your first day's food, lunch boxes, plastic bags and disposable chopsticks. No one dares to tell you the details of this one-day income. Even if two people stand together to buy things, they earn more and earn less, but I know that the interest rate of this thing is ok. For example, if you buy three fresh potatoes, the main ingredients are potatoes, eggplant, peppers, ingredients such as starch, salt, oil, sugar, soy sauce, etc., put more of these three main ingredients which are cheaper, and put less of them which are expensive. If you have three dishes and three meals for a box lunch, you can control it at 8. When purchasing materials, choose high-quality raw materials with low prices. By the way, you should try to buy fast food in places where taxis are dense, and it is too easy to get caught near schools and shopping malls. The consumption of taxi drivers and some offices is not worse than that of schools and shopping malls. If you are afraid of trouble, you can find some taxi drivers and send them some small cards, which tell you where to buy fast food. Finally, I would like to remind you that fast food in people's minds is unsanitary. You must make your small dining car clean before anyone will believe you. You must be careful not to have messy things in your food. As for how many copies you can sell in a day, it depends on your location and the taste of your food. You can try to make a goal for yourself, for example, you plan to serve 111 servings on the first day, and then you can see the reaction of your guests. If the reaction is good, you can increase it to 151 servings the next day, if the reaction is not good, you can improve it, and then drop it to 81 servings the next day. Control the sales volume you plan every day, so that you won't have any surplus. The surplus is the most troublesome. Processing will affect the taste and your business. If you don't process it, it will be a loss. Control the cost, sales and surplus, then the chances of making money are greater.