Etiquette mainly refers to moral education. "If you don't learn etiquette, you can't stand up and be a man."
Music not only means aesthetic education; Rites are external, while joy is internal. Joy makes everyone blind date, courtesy makes everyone respect each other; Music makes everyone the same as each other, and rituals make everyone different from each other. Is this from the Book of Rites? It's very clear in the music book.
Shoot and shoot arrows;
Royal, driving; Together, the two are sports and labor;
Books, various historical and cultural knowledge;
Numbers, math.
In today's words, in general, it means all-round development of morality, intelligence, physique, beauty and labor.