Yong-le: Year 4, Month 10, Day 21
1 Dec 1406
It was ordered that the Xin-cheng Marquis Zhang Fu, deputy general of the right of the force being sent on expedition to punish Annam, take on the seal of "General for Subduing the Yi" and the post of regional commander, that the Yun-yang Earl Chen Xu take on the post of assistant regional commander of the right, and that they lead the troops in attacking Annam. They were sent Imperial orders of instruction as follows: "My Imperial father, the Gao Emperor Tai-zu, ordered the great general, the Kai-ping Prince Chang Yu-chun and the deputy general, the Qi-yang Prince Li Wen-zhong, to lead the troops on the Northern expedition. Although the Kai-ping Prince died in Liu-he-chuan, the deputy general, the Qi-yong Prince, led the troops in completely decimating the hu, thus bringing great merit to himself and achieving a place in the history books. You should be determined and strong, follow the example of your predecessors and take advantage of the Winter months when the miasmic vapours are in abeyance. Plan jointly with coordinated efforts and eliminate the rebellious bandits. Establish yourselves glorious names which will last for 10,000 generations by faithfully carrying out my commission."
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 11, page 878