Yong-le: Year 14, Month 4, Day 20
18 May 1416
Ding Shi-yan, a company commander from the Zhen-yi Guard in Jiao-zhi, came to Court. Shi-yan had his origins in Nan-ce Subprefecture. When Jiao-zhi was first pacified, he showed himself effective in the capture of bandits, and the Ying-guo Duke Zhang Fu appointed him to a post. At this time, he came to Court and offered tribute of horses in gratitude for Imperial grace. Paper money and silver were conferred upon him and he was sent home.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 13, page 1922