1. Pay equal attention to literature and literary theory.

During the Wei, Jin, Southern and Northern Dynasties, literary theory began to pay attention to the combination of literature and literary theory. Scholars in Wei and Jin Dynasties emphasized the artistry and ideological connotation of literary works and began to make a systematic theoretical discussion on literary creation. For example, Wang Chong's Lun Heng discusses the aesthetic laws and artistic characteristics of poetry, fu and ode, which has become an important model for later literary theory research.

2. Take literary aesthetics as the core.

Literary theories in Wei, Jin, Southern and Northern Dynasties began to put aesthetics in an important position, and explored the aesthetic value and standards of literary works. Among them, Liu Xie's Wen Xin Diao Long is regarded as a classic of China's ancient literary criticism, which systematically expounds the aesthetic principles of literary creation and emphasizes the emotional expression and artistic expression of literature.

3. Pay attention to the personalized expression of literature

The literary theory of Wei, Jin, Southern and Northern Dynasties began to emphasize the individualized expression and innovation of literary creation. Writers encourage writers to express their true feelings, advocate expressing individuality and uniqueness through works, and pursue innovative and personalized artistic expression.

4. The relationship between literature and life and morality.

Literary theory began to emphasize the relationship between literary works and life and morality. Literature is regarded as the carrier of moral education and philosophy of life, emphasizing that literary works should have positive social significance and educational functions. For example, Wen Xin Diao Long proposed that literature should take the principle of "Tao meets human feelings" and pay attention to the reflection and shaping of humanity, emotion and morality in literary works.

5. Development and innovation of poetic style.

In terms of literary forms, many new literary forms and styles appeared in the Wei, Jin, Southern and Northern Dynasties. The development of poetry, prose and prose pursues the change and innovation in form, and pays attention to expressing individuality, emotion and aesthetic pursuit.

The innovation of stylistic theory in Wei, Jin, Southern and Northern Dynasties lies in linking the aesthetics and morality of literary creation, putting forward aesthetic standards and principles, and emphasizing the individualized expression and innovation of literature. These theoretical concepts occupy an important position in the history of China literature, and have a far-reaching impact on later literary theory and creation.