Cheng-hua: Year 21, Month 12, Day 7
12 Jan 1486
The Qian-guo Duke Mu Cong, regional commander of Yun-nan, and others advised: "The various yi of Yun-nan are barbarous, rebellious and perverse. We cannot control them without native officials. As the native officials do not clearly differentiate between primary wives and secondary wives, recently there have been succession disputes lasting several years. When the officials are investigating the facts, there is often the suspicion that they receive bribes. There are thus repeated accusations and arguments and for a long period there is no successor. I am afraid that if there is no uniform system for the various yi, other rebellions may occur." The memorial was sent to the Ministry of Rites which held: "A system should be sent down whereby once every three years the native officials memorialize a list of their primary wives and secondary wives and whereby, when there is to be succession, the three offices jointly carry out an investigation to be completed within three months." This was approved.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 50, page 4599