《明史·列传·卷一百一十》
东起延绥、永平地区，西到嘉峪关七镇，数千里地军民安居乐业，不动兵兴武，每年节省十分之七的费用。
东起延、永，西抵嘉峪七镇，数千里军民乐业，不用兵革，岁省费什七。
From Yansui and Yongping districts in the east to the seven towns of Jiayuguan Pass in the west, the military and civilians lived and worked contentedly in the thousands of li of territory, and there was no use of soldiers or weapons, meaning that seven tenths of the annual expenditure was saved.