This is not expressly stipulated, but there are requirements for sanitary measures to keep the ambient air clean. The plane layout should prevent soot and cooking oil fume from blowing in the kitchen, prevent the bad smell from entering the toilet, and avoid mutual interference between rooms. In the "Hygienic Standards for Hotels and Restaurants", the microclimate, air quality and ventilation standards of restaurants and restaurants are also stipulated. Therefore, if we want to meet the standards, we need to provide the hardware measures to meet the standards in the design.