1. Jiangnan area is one of the areas with prosperous culture in China history, and it is also an important hub for cultural exchange.
Jiangnan, with convenient transportation, is the commercial center of China. Businessmen often travel from one place to another, which is conducive to the spread of books.
3. There are many talented people in Jiangnan area, and cultural institutions such as academies, libraries and printing houses are relatively developed, which provides good conditions for the printing, storage and circulation of books.
Therefore, Jiangnan area has become an important hub for books to spread eastward in history.