What is China's traditional literary theory's point of view on the trisection of the structure of literary works?

Trigonometry: According to the different ways of constructing aesthetic images in literary works, literary genres are divided into three categories.

Namely: narrative, lyric and drama.

Trigonometry classifies literary works according to different methods of creating images and reflecting life, and captures some important basic characteristics of various genres, which has strong generalization power. However, it only classifies from three different aspects: narrative, lyric and drama, ignoring the characteristics of various genres of literary works in other aspects such as system, structure and language, thus separating some literary genres with the same basic characteristics that should belong to the same category. For example, quoted poems and narrative poems in poetry, lyric prose and narrative prose in prose are rigidly separated and classified into two categories. In this way, the similarities between lyric poetry and narrative poetry, lyric prose and narrative prose are easily overlooked.