《明史·志·卷四十七》
永乐以后，选取官吏中四卫营的官军编外人员曾经经历过战争而立功的，命其原带俸以及管事袭封或代替，后世全部沿袭下来。
永乐后，取官舍旗军馀丁曾历战功者，令原带俸及管事袭替，悉因之。
After the Yongle period, the government selected the extra staff of the official army of the four guards from among the officials who had experienced wars and made meritorious achievements, allowing them to inherit the original salary and duties, which was passed down to later generations.