I, the master, have dismounted and my guest has boarded his ship. What is intertextuality? What's the use?

This sentence adopts intertextual rhetoric. "Intertextuality" can not be understood simply from the form of words, but from the context and meaning.

My guests and I got off the horse and went aboard for dinner. The rhetoric of intertextuality: "I, the master, have dismounted, and my guest has boarded his ship" is the same as the rhetoric of "the general died after hundreds of battles, and the strong man returned ten years later" in Mulan Ci.

Intertextuality is characterized by "keeping words but meaning", which is mainly manifested in two aspects: first, structural characteristics: mutual existence. For example, "A general dies after hundreds of battles, but a strong man returns after ten years" (Mulan's poem), and the word "strong man" is omitted at the beginning of the sentence, which separates the word "general" from the word "strong man" and complements them alternately.

Second, semantic features: complementarity. For example, "the window is decorated with clouds and the mirror is yellow" (Mulan's poem), and Mulan faces the window, including the mirror. The two actions of "arranging" and "pasting" are carried out in the same situation and should be put together when translating.