Teaching and understanding words. Filial piety (pū). "Yi", seal script is like holding a stick or whip. In slave society, slaves mainly rely on whips and sticks for education and enlightenment. Original meaning: educational guidance.

Education, literacy. Oracle Bone Inscriptions glyph, like a woman giving birth to a child. Above is the "mother" and the decoration on her head, and below is the "child" hanging upside down.