I want to sell box lunch. What should I prepare and pay attention to?

First, you have to prepare a container or box to keep your lunch warm. Secondly, you should always pay attention to when the urban management will come. Most importantly, you should seize the time when people eat and sell their lunch. Usually the urban management will eat it, and then you can sell the box lunch very well. If you are caught by the urban management, you will not be fined, but you will take away all the things you earn money, but generally the urban management will warn you once or twice, and then you will be confiscated directly.