Zheng-tong: Year 13, Month 2, Day 4
8 Mar 1448
Zhen Wan, assistant administration commissioner of the left in Guang-xi, advised: "Si-ming Commandery and An-long Subprefecture, which are subordinate to Guang-xi, border Jiao-zhi and although there are troops on guard, there is no official to exercise supervision. For many years, there has been great negligence. The native people, avaricious for small profits, engage in trade by secretly coming and going along small by-paths. It is truly feared that this will give rise to border troubles. It is requested that a just, wise and brave guard commander be selected and promoted, so that he can exercise supervision over the prohibitory regulations. In this way, the border passes will be firmly secured and the area will be at peace." It was ordered that the Ministry of War deliberate upon and implement this proposal.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 29, page 3157