Introduction to the twelfth hospital: The twelfth "Fire Attack Chapter" discusses the methods, conditions and principles of using fire attack in war. Sun Wu believes that there are five types of fire attack: fire people, fire accumulation, fire baggage, fire storehouse, and fire team, that is, burning the enemy's camp, accumulation, baggage, treasury, and transportation facilities. The focus is on destroying the enemy's manpower, material resources and transportation lines. These five fire attack methods must be used in a variety of ways. Our army can master it, and the enemy can also master it. We should pay attention to precautions. The attack must meet the conditions. In addition to the equipment for setting fires that must be prepared at all times, you must also choose the right time when setting fires. Set fires on dry and windy days. The implementation of fire attack must also be coordinated with the soldiers' attack, so that the role of fire attack can be brought into play and the purpose of winning victory can be achieved.