Yong-le: Year 8, Month 7, Day 10
10 Aug 1410
Liu You-nian, an assistant surveillance commissioner in Jiao-zhi, advised: "The various guards in Jiao-zhi should follow the pattern in Yun-nan, whereby 3 in 10 of the troops remain guarding the city walls, while 7 in 10 engage in farming military fields. Each guard should set up a fort and when there is an alert they can enter the fort and wait to be deployed. Doing things in this way will ensure that there is no interference with local agriculture and also that soldiers are not unemployed. Further, there will thus be grain stores on the border and the people can be exempted from paying grain taxes." The Heir Apparent ordered the Ministry of War to deliberate on and implement this measure.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 12, page 1370