Yong-le: Year 5, Month 2, Day 8
17 Mar 1407
Imperial orders were sent to the Xin-cheng Marquis Zhang Fu, regional commander of the force sent on expedition to punish Annam. The orders read: "When the troops overcome Annam, enquire far and wide within the borders for knowledgable and moral men, as well as those who have abilities which can be used or skills which can be employed. Such people should, with due ceremony, all be sent to the Court."
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 11, page 911