Xuan-de: Year 8, Month 7, Day 8
24 Jul 1433
The Auxiliary Censorate was ordered to strictly implement the prohibition on private dealings with fan countries. The Emperor issued instructions to Gu Zuo, censor-in-chief of the right, and others, saying: "There are already regulations prohibiting private contacts with foreign fan. In recent times, officials, military personnel and civilians have not been observing this prohibition and have frequently built ocean-going ships and, on the pretext that they are on Court business, have taken it upon themselves to go to the various fan and brought harm to the foreign yi. In other cases, they have been lured into becoming pirates. Recently, some have been captured and they were all given severe punishments. You should clearly make known the previous prohibition and place public announcements, notifying the military personnel and civilians along the coast that if there are violations of the prohibition, the first person to advise will, on verification, be given half of the property of the offender's family. Those who have such knowledge and do not advise, as well as the officials of the military guards who tolerate such offences and do not prohibit them will also be punished for their crimes."
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 21, page 2308