The word "primary school" did not specifically refer to schools at first. In the Western Han Dynasty, philology was called "primary school", and in the Tang and Song Dynasties, it was also called "primary school". Reading must first be literate, master the form, sound and meaning of words and learn to use them. When children entered school in the Zhou Dynasty, they first learned harmony (referring to six groups of simple strokes from Jia). Six books refer to things, pictographs, sounds, meanings, annotations and debates, so "philology" used to be called "primary school", hence the name "primary school". Primary school is attached to Confucian classics and regarded as a university, so it is called primary school. It is divided into three parts: phonology, writing and exegesis.

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"University" is a "primary school", that is to say, it is not a "primary school" that talks about "detailed exegesis and clear sentence reading", but a "university" that talks about running the country and keeping the country safe. "University" is an adult's study.

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