Xuan-de: Year 3, Month Intercalary 4, Day 10
23 May 1428
The Jiao-zhi university students, native officials and native clerks, including Ruan Zhi, Wu Xi-yi and others, a total of 160 persons, were sent back to their villages. It was ordered that the Commissioner-in-chief Shan Yun send people to escort them to the Jiao-zhi border.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 18, page 1030