How to understand Jiao Ran's poetic theory that "more than two meanings are all meanings outside the text"?

Jiao Ran's poetics pays attention to this kind of artistic conception, and his works have a special aesthetic character after completion, that is, they have multi-level and even endless aesthetic significance beyond the superficial words and images: "More than two meanings are the purport of the text", but it pays attention to temperament and ignores the words. Gaishitao is extremely good. In fact, these discourses have revealed the essential characteristics of poetic artistic conception, that is, on the basis of artistic conception, it has aesthetic tolerance for superficial words and images, which can stimulate readers to have multi-level or even endless aesthetic feelings. Of course, Jiao Ran's statement on this issue still lacks a clear and complete theoretical form.