The notion of analogy came from music language in the West Zhou Dynasty, referring to comparison by species. Characterstic
of connotating political amd moral conceptions and mildness and tactfulness, analogy embodies the orientation of respecting learning and emphasizing education in propriety and music culture in the Zhou Dynasty. The author of The Book of Songs didn’t have awareness of using analogy. Later, scholars in the Han Dynasty, however, started explaining The Book of Songs by analogy, so analogy turned from a means of using poems to a means of
writing poems, whose motivation continued to be comparison. The Han scholar’s
literary view of analogy didn’t agree with the writing practice of The Book of Songs, but was accepted and practised by the later writers. Under its impact, analogy was converted from a way of beginning in folk song to a powerful artistic craftsmanship in literary works. It grew not only into the literary tradition of analogy and sustenance but also into the way of expressing one’s mental impression and heart’s contents. Hence the appearance of artistic vision blended with scene and sense.