I think, if it is promoted, it should be promoted from friends around me first. Let your friends taste your cooking first, and then let your friends recommend it to people they are familiar with. Over time, many people will buy it. You can also hold a free goods tasting, set up a stall in a crowded place, and then put all your own things there for everyone to taste. You can give them your business card when you taste it. There are many ways to do it, that is, you don't have to go to school, square or other places every day, once every three days or once a day, as long as there are many people or students and couples.