The number of six arts books is about the knowledge education of reading, writing and arithmetic. Books are literacy education, divided into "six books": pictographic, knowing, annotating, referring to things, borrowing and harmonic sounds; Number is the education of mathematical knowledge, which is divided into nine numbers: square field, millet, decreasing fraction, less generalization, quotient, equal loss, surplus and deficiency, equation and pythagorean. Mathematics education has obvious practical and effective characteristics, and it is taught in primary schools, so it is called "small art", which is the basis of learning etiquette and music. She studied in college, so she was called "great art", and it was also a necessary preparation for practicing etiquette and music. The teaching of rites and music is the highest realm of moral knowledge, and it is the necessary accomplishment to learn to govern the country for the monarch and the world, so it is called "Avenue" and "Great Virtue". Although the number of books taken is indispensable, they are "documents" after all. The so-called "a gentleman's road is not a tool" probably stems from the tradition of attaching importance to morality over skill in ancient China education.