At least 4 exits are required. Because the fire protection requirement is that the single floor area is more than 200 square meters and above, evacuation stairs need two safety exits, and there is a back door and a gate for normal business, so there are four doors. If the single floor area exceeds 1500 square meters or the total area exceeds 3000 square meters or above, it is necessary to add automatic sprinkler system and automatic alarm system. If not, only fire hydrants, emergency lighting and fire extinguishers are needed.