The door curtain is not to stop flies. Is there a place outside? Can there be flies? The main functions are as follows: 1, customers outside can't see the operation inside; 2, the smell of hot food inside is less, because the hot smell goes up; 3, the kitchen is beautiful as a whole, because there is an exhaust fan, and the bottom is left blank for the outside air to suck in, and in addition, it can stop flies from walking in.