《明史·列传·卷十三》
现在我们乘敌不备，直捣太原，使其进不能战，退无所守，这就是攻击敌人的要害和虚弱之处。
今乘敌不备，直捣太原，使进不得战，退无所守，所谓批亢捣虚者也。
Now, let’s seize the opportune moment, launch a direct attack at Taiyuan, and force the enemy to either abandon their defense or be unable to fight back, because this is the key to attacking their weakest points and forcing them down.