Yong-le: Year 5, Month 11, Day 19
18 Dec 1407
The native-official Vice Commander Chen Feng, the Battalion Commander Ruan Zheng, the Company Commander Song Ru-lu and others, a total of 20 persons, all from Jiao-zhou Right Guard, came to Court and offered tribute of local products. Eighty ding of paper money and a suit of clothing made from ramie-silk were conferred upon each of them, while paper money, as appropriate, was conferred upon their attendants.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 11, page 1021