Yong-le: Year 1, Month 1, Day 10
1 Feb 1403
The five chief's offices of Zhe-le Dian, Da-hou, Gan-yai, Wan Dian and Lu-jiang were established subordinate to the Yun-nan Regional Military Commission. At this time, the Xi-ping Marquis Mu Sheng advised that these areas were formerly under Lu-chuan/Ping-mian and that, as the land was broad and the population dense, it was appropriate that chief's offices be established to rule them. Thus, this order was issued.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 9, page 295