Li Si's Exhortation Book lists four monarchs who made outstanding contributions to Keqing in Qin State: they were eager for talents, good at knowing people, good at coachable, and Qin Zhaowang was meritocratic.
The extended information "The Book of Advice" is also very knowledgeable. It is not only valuable in thought, but also rich in words and sentences, brilliant in literary thought and superb in writing skills. Its main features are: 1. Setting facts, setting metaphors, emphasizing narration, being strong in argumentation and thorough in reasoning.
Facts speak plainer than words. The hard facts are the most convincing. A series of historical facts listed in the first paragraph of the article have played a good role in explaining Ke Qing's contribution to Qin.
Metaphor is also an effective rhetorical device. In this paper, many metaphors are used to explain "Qin is not a product, but a treasure" and "Kings are not all numb". It can even be said that most articles are composed of metaphors. It is precisely because of the extensive use of facts and metaphors that they are repeatedly used, re-described and re-rendered, which not only makes the truth simple and vivid, but also enhances the characteristics of the article.
Baidu Encyclopedia-A Book of Persuasion and Expulsion