《明史·列传·卷五十二》
不要贪小便宜，不要轻视远国的要求，加固壁垦，清除转移周围的人口事物，使敌人得不到什么。
毋贪小利，毋轻远求，坚壁清野，使无所得。
Don't take advantage of small things, don't underestimate the demands of distant countries, strengthen the fortifications, clear away and relocate the surrounding population and things, so that the enemy can't get anything.