What is the difference between postmodernism and avant-garde art and literature?

Avant-garde novel: a novel trend of thought that rose in the mid-1980s. Its creative characteristics are as follows: first, it is manifested in the avoidance, rebellion and digestion of ideology in culture; The second is to subvert the traditional view of truth in literary concepts, and the text only has the function of self-reference; Thirdly, in the text characteristics of narrative games, the characters tend to be symbolic and the characters have no depth. Writing strategies such as parody and irony are usually adopted.

Postmodernism is an artistic, social, cultural and philosophical trend of thought that occurred in Europe and America in the 1960s and became popular in the West in the 1970s and 1980s. Its essence is to abandon the basic premise of modernity and its normative content. Postmodernism permeates all aspects of contemporary society. The main features of postmodern literature:

1. Completely unconventional.

2. Abandon the so-called "ultimate value".

3. Advocate the so-called "zero-degree writing".

4. Deliberately break the boundary between elite literature and popular literature.