What should I do if the ventilation fan in the restaurant is turned on and the stove is poured as so

This problem is the problem of air convection, when the door is closed, the space of the whole room is closed, when the exhaust fan is exhausted, the indoor air is negative pressure, and the air must be supplemented from the outside, then the only place that can be the same as the outdoor will enter the air, in your place, the furnace will pour smoke, open the door, fresh air can be added from the door, so the stove will not pour smoke, the power of your exhaust fan has nothing to do with the smoke, no matter how small the exhaust fan is, as long as your house is completely closed, If there is only a chimney, the air will come in from the chimney, and the solution is to arrange a separate air inlet in the room, which can attract new air from the outside without affecting the flue of the furnace.