《明史·列传·卷一百零四》
探究《世子》篇中陈述保傅的教导、幼学的仪礼，就会注意到皇储应当早点进行教育。 
绎《世子》篇陈保傅之教、齿学之仪，则可见皇储之当早建豫教。 
By examining <Heir> , the guidance of teachers and the etiquette of young children in are explained. Thus we can see that the education of the crown prince should be carried out early.