Classics often talk about what order they are written.

The order of classics, history, sub-themes and collections. Classic Talk consists of thirteen articles, written in the traditional order of classics, history, philosophers and collections. It started with Xu Shen's Shuo Wen Jie Zi, and expanded to the classics such as Zhouyi, Shangshu and Shijing, and the historical departments such as Warring States Policy, Historical Records and Hanshu, and then to hundred schools of thought, Ci Fu and poetry. The context is clear and orderly, which has a good guiding role for readers to understand the classics of Chinese studies.