Yong-le: Year 5, Month 9, Day 2
2 Oct 1407
The Eunuch Director Zheng He who had been sent to the various countries of the Western Ocean, returned, bringing the pirate Chen Zu-yi and others in fetters. Previously, when he had arrived at Old Port, he came across Zu-yi and so on and sent people to bring them to negotiated pacification. Zu-yi and the others feigned surrender but secretly plotted to attack the Imperial army. He and the others found out about this and, marshalling the troops, prepared defences. When the forces led by Zu-yi attacked, He sent his troops out to do battle. Zu-yi suffered a great defeat. Over 5,000 (Alt: 50) of the bandit gang were killed, while ten of the bandit ships were burnt and seven captured. Further, two false bronze seals were seized and three prisoners, including Zu-yi, were taken alive. When they arrived at the capital, it was ordered that all the prisoners be beheaded.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 11, page 987