Look at the taste of the public! You can go to the market to observe and do a market research. See which business is better. What do they like to eat? People's tastes sometimes change with popularity. Suppose you open a new store, and at first you should attract the audience's trend. Small profits but quick turnover, then you must make some beaks. Actually, when it comes to maocai and hot and sour powder, I think if you can eat spicy food, you should choose hot and sour powder.