1, South-North Volume Classification The Northern Song Dynasty (960-1 127) was a book classification, which mainly classified books according to the nature and characteristics of their contents, and then subdivided each category according to factors such as times, authors and regions.

2. The South-North Volume Classification in Ming Dynasty is a book classification that appeared in Ming Dynasty (1368-1644). Different from the North-South volumes in the Northern Song Dynasty, the classification method of the North-South volumes in the Ming Dynasty is more detailed, and each kind of books is subdivided into several subcategories for easy retrieval and management.

3. Generally speaking, the difference between Song Dynasty's Nanbeijuan and Ming Dynasty's Nanbeijuan lies in time and content. The former is classified by geographical location, while the latter is classified by cultural tradition.