This book is an introduction to the long historical novel "The Romance of the Three Kingdoms". The author uses the key characters and key plots in the book as the starting point, and combines Pei Songzhi's annotation of "The Romance of the Three Kingdoms" and Mao Zonggang's rewriting and comments on "The Romance of the Three Kingdoms" to explain its cultural value from the perspectives of the work, author, and interpretation methods. It also conducts an in-depth analysis of the key plots and key details in the book around representative figures such as Guan Yu, Zhuge Liang, and Cao Cao. The book guides readers to understand the rich connotation and lasting artistic value of the work by interpreting the core content, structural layout and character creation methods of the work.