Selling sandwiches at stalls triangular sells well. Triangle shaped sandwiches look more attractive and are easier to spot, which is good for attracting customers' attention. Triangle shaped sandwiches are easier to pick up and eat or put in a pocket and take with you, so they are more suitable for customers to eat on the go. Whereas pocket shaped sandwiches are easier to pack and can preserve the freshness of the ingredients better. Compared to pocket sandwiches are more lacking, so it is good to set up a stall to sell sandwich triangles.