Hong-wu: Year 35, Month 7, Day 1
30 Jul 1402
...Those practices established by our ancestor and changed in the Jian-wen period, will now revert to their original form...The military personnel and people who reside in the coastal regions have in recent years repeatedly gone and privately traded with fan countries. In future this will not be permitted. All offices are to comply with the precedents and prohibitions of the Hong-wu reign...
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 9, page 0145/50