Hong-wu: Year 29, Month 4, Day 27
3 Jun 1396
During this month, Ning Zheng, commissioner-in-chief of the left in the Right Military Commission died. Zheng ( zi Zheng-qing) had his origins in Shou Subprefecture, Feng-yang... In the 19th year (1386/87), he was appointed as regional military commissioner of Yun-nan. In the 21st year (1388/89), the Bai-yi occupied strategic positions and engaged in revolt. The bandit general Dao Si-lang and so on gathered over 100,000 troops and over 100 elephants against the opposing force. Zheng led the troops in following the Xi-ping Marquis Mu Ying into battle. They killed two generals and the bandit troops fled. All of the enemy's elephants and horses were captured.... At this time, he died of illness.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 8, page 3562/66