Jia-jing: Year 2, Month 3, Day 24
9 Apr 1523
Sun Cheng-en, a compiler in the Han-lin Academy and Yu Dun, a supervising secretary of the right in the Office of Scrutiny for Rites, had been commanded to take Imperial orders of instruction and variegated silks and instructions to confer upon Li Zhou, the king of the country of Annam. However, when they arrived at Long Subprefecture, they heard that the minister Chen Hao had rebelled, that Zhou had been killed and that the people had established Zhou's second son Hui as king. The minister Mo Deng-yong then rebelled and drove Hui away. Thus the roads were blocked and the envoys could not enter. They returned to Wu-zhou where Dun fell ill from miasmic vapours and was on the point of death. Cheng-en memorialized details of the situation. In addition, a memorial from the Censor-in-chief Zhang Ding, the supreme commander of Guang-dong/Guang-xi also arrived at the capital. The Ministry of Rites re-submitted these with its deliberations. The Emperor ordered that Cheng-en return to the capital and that the grand defender and grand coordinator be instructed to investigate and advise on the situation in the yi region.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 71, page 698