Yong-le: Year 3, Month 11, Day 22
13 Dec 1405
The Messenger Tan Sheng-shou and others who had been sent as envoys to Old Port, returned with the chieftains Liang Dao-ming, Zheng Bo-ke and others, who came to Court to offer tribute of horses and local products. A total of 150 ding of paper money as well as 12 biao-li of patterned fine silks and 70 bolts of thin silks were conferred upon Dao-ming and the others.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 10, page 734