The eight-part essay was a style used in the imperial examination in ancient China. It referred to a fixed paragraph with four sentences in each paragraph, and the grammar and structure of each sentence had to follow certain rules. The content of the eight-part essay examination was mainly the structure and style of the article, so it was very challenging for the novelist. If a novelist wanted to write a perfect eight-part essay, he needed to be proficient in the rules of grammar and structure and be able to use them freely.