The electricity load of shops is not large, so it is more appropriate to choose 220V voltage standard. The 220V voltage standard is not only economical and practical, but also simple to operate, without special circuits and equipment. Breakfast shops operate breakfast foods such as porridge, fried dough sticks, steamed stuffed buns and noodles, and the lighting is also 220 volts. Even some processors are now mostly equipped with 220 volts, and household voltage can also be used for processing.