Ban Gu (AD 32-92), a historian and writer in the Eastern Han Dynasty, divided ancient and modern figures into "nine scales" in his Han Shugu Ren Jin Table, which was divided into three categories: upper (intelligent), middle (middle) and lower (stupid). At each level, it is divided into: upper, upper, middle, lower, lower, upper, lower, middle and lower. This may be the source of later classification.

Extended data:

1, synonym: very different.

Pronunciation: qiān chā wàn bié

Meaning: There are many kinds of descriptions, which vary greatly.

Synonym: far apart, far apart.

Antonym: half a catty is the same.

Usage: as predicate, attribute and object; There are many different descriptions.

Source: Mentor Wensui, Deng Chuan Road, Jingdezhen

2, antonym: exactly the same

Pronunciation: há o wú r.

Meaning: There is no difference at all. It means exactly the same thing.

Usage: more formal; As predicate and attribute; It means exactly the same thing.

Source: Contemporary Officialdom by Qing Li Garbo.

For example, the style change at that time was exactly the same as the modern literary revolution, from classical Chinese to vernacular Chinese.