Secondly, the book takes the waterway as the key link and also covers the geography, history, economy, humanities and other aspects of the waterway. The content is extremely rich and detailed. This kind of writing is only possible under the condition that a large number of local geographical descriptions have appeared since the Han and Wei Dynasties. Its research on the geography of later generations not only provides a lot of valuable resources, but also gives inspiration to later generations in style. The content of this book covers almost all counties and even foreign regions recorded in the official geography of Han and Jin dynasties, so it has become an important reference book for those who continue to write any local chronicles and Chinese and Western traffic history books since then.
Thirdly, there are 437 kinds of ancient books and inscriptions in the Han and Wei Dynasties, mainly geography. Most of the original books have been quickly scattered, so they have been handed down to this day, making it rare for future generations to see Ji Guang's feathers and preserving a large number of precious documents. It also collected and absorbed realistic materials such as hydrology, water conservancy, irrigation, farming, architecture and gardens. Therefore, it became a collection of ancient geographical knowledge in China before the Northern and Southern Dynasties.
Fourthly, the book inherits the tradition of Shan Hai Jing and Yu Gong's unified thought. Written in the Northern and Southern Dynasties, but the author can get rid of the shackles of being born in the Northern Wei Dynasty and the split between the North and the South. Instead, the scope of Han's activities is the object of unified description.
Fifth, the book is concise and elegant, with the rhetorical characteristics of parallel prose, which can be described as vivid and beautiful landscape prose.