《明史·志·卷四十五》
宗学的设置，世子、长子、众子、将军、中尉年纪不满二十的都在其中学习。
宗学之设，世子、长子、众子、将军、中尉年未弱冠者俱与焉。
Those enrolled in the clan academies were the son of the prince, the eldest sons and the other sons, and all generals and lieutenants under the age of twenty.