What does literary chicken soup mean?

The term "chicken soup" is a fashionable term these days, and the most typical one is "chicken soup for the soul." The so-called chicken soup, as the name suggests, is very tonic and nourishes people. In this way, literary chicken soup is not difficult to understand, and it is a literary work that is more intelligent, touching, and enlightening (usually it should be a short piece rather than a long article).