Yong-le: Year 17, Month 12, Day 25
10 Jan 1420
It was ordered that Liu Zhong-lian and Xu Kuo, both vice ministers in the Ministry of Works, proceed to Jiao-zhi to make a new assessment of population registration and land taxes. It was also ordered that they investigate and advise on the situation and problems of the military and the civilians.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 14, page 2180