Yan Zhitui. Yan Zhitui, a writer in the Northern Qi Dynasty, wrote 20 family instructions for Yan's family, including Preface, Godson, Brother, Managing Family, Mu Xian, Contention for Learning and Involving Matters, which included many methods of family education and preschool education. Mainly advocate early education, advocate the combination of strictness and goodness, demand universal love and impartiality, advocate erudition for practicality, and attach importance to weathering and edification.