Zheng-de: Year 10, Month 4, Day 5
18 May 1515
The grand defender and grand coordinator of Guang-dong/Guang-xi memorialized: "Yang Lang (Alt: Xiang Lang), the son of the Duan-qing Prince of Annam, is returning to his country from Si-ling Subprefecture to inherit his post. He has requested that government troops from the nearby areas of Si-ming and Zhong-jiang be sent to escort him. However, the yi situation is difficult to assess. We have already sent persons to investigate the situation and issued strict orders to the border defenders." The Ministry of War advised: "Annam is separated from us by mountains and seas. Although during the Yong-le reign (1403-24) it was part of China, because it subsequently rebelled it was abandoned. We should not do things for the distant yi (Alt: external yi ) if it means annoyance for China. How can we despatch troops to escort him! We should instruct the areas in the regions close to Annam to adopt strict defence measures and not allow the yi persons to enter the borders. We should also prohibit the various peoples from having secret communication across the border." This was approved.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 67, page 2485