Setting up a stall outside the university can basically achieve 10% business as long as it is clean and distinctive, but it depends on how many people you are prepared to do it. If there are few people, it's best not to make it too complicated. And it is best not to be too seasonal, and it is best to do it all year round, and the price of raw materials is stable. You should also consider whether your skills are good or not before deciding what to cook.