Fried cold noodle rolls and stinky tofu are some of the most popular street snacks and are usually sold in an outdoor environment. Placing them in a window stall can attract the attention of passers-by, increase product exposure and attract more customers. Window stalls provide a convenient way for customers to buy and enjoy the food directly from the window. Window stalls can also provide a convenient pick-up point for customers, so they can quickly get their food and continue their journey.