《明史·列传·卷一百五十八》
贼兵假如占据归山、巫山的顶峰，向下俯瞰我们的军营，再用强劲的骑兵居高临下，俯冲下来，张令一定会被打败，张令败后再来打我，我失败后还能解救重庆的危急吗？
贼据归、巫万山巅，俯瞰吾营。铁骑建瓴下，张令必破。令破及我，我败尚能救重庆急乎？
If the rebels occupy the peaks of Guishan and Wushan, look down on our camp, and use their strong cavalry to attack us from a high position, Zhang Ling will definitely be defeated. And if Zhang Ling is defeated and then comes to attack me, can I still save Chongqing?