《六韬·虎韬·必出》
设置烟火信号的目的。是为了指示先期突围的部队至有火的地方集结。
因以火为记，先出者令至火而止，为四武冲阵。
The purpose of setting up smoke signals is to direct the troops that broke out first to gather where there is fire.
<s>[INST] Rewrite the following English passage in the style of Classical Chinese: The purpose of setting up smoke signals is to direct the troops that broke out first to gather where there is fire. [/INST] 因以火为记，先出者令至火而止，为四武冲阵。</s>
Rewrite the following English passage in the style of Classical Chinese: The purpose of setting up smoke signals is to direct the troops that broke out first to gather where there is fire.
user
因以火为记，先出者令至火而止，为四武冲阵。
assistant