3 to 5 bottles of fire extinguishers. Shanghai Fengxian District snack bar in order to protect the safety, storage of gas canisters in the room is strictly prohibited open flame and stacking of flammable and explosive materials, fire requirements put 3 to 5 bottles of fire extinguishers. "Fire" is to eliminate potential hazards, disaster prevention (i.e., prevention and resolution of man-made and natural, accidental disasters encountered by people in the process of life, work, learning, in general).