《明史·志·卷四十八》
世官有九等，指挥使，指挥同知，指挥愈事，卫镇抚，正千户，副千户，百户，试百卢，所镇抚，都有世袭职位，有轮替职位。年幼时，有优厚供给。
世官九等，皆有袭职，有替职。其幼也，有优给。
There are nine levels of hereditary officials. Commanders, Deputy Commanders, Captains, City Governors, Centurions, Deputy Centurions, Hundreds, and Captains all have hereditary positions with rotating positions. In childhood, they have generous allowances.