Yong-le: Year 14, Month 9, Day 11
1 Oct 1416
It was commanded that Rong, the son of the deceased Embroidered-Uniform Guard Battalion Commander Yang Zhen, inherit his father's post and be promoted to assistant commander of that guard. Previously Zhen had accompanied the Eunuch Director Zheng He when he was sent as an envoy to the Western Ocean, but he had died in Sri Lanka. At this time, his achievements were rewarded and his son was promoted and employed.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 13, page 1956