From the perspective of cost theory, the investment in opening a restaurant has become a sunk cost. No matter whether it is opened or not, fixed costs such as rent need to be invested. Opening a store at noon can make up for this part of the cost to a certain extent, while opening a store at noon can maintain its own market share and even play a certain signal role, which can deter competitors and attract customers. Therefore, from the perspective of enterprises, it will continue to open up.