There are several ancient books in the pre-Qin period.

China is a country with a long history and culture. Paying attention to the writing and preservation of historical works is one of the important reasons why our national culture has been preserved so far. China's history of writing historical works began in the Spring and Autumn Period and the Warring States Period. At that time, it was a period of brilliant ideas. Different schools actively promote their ideas. It is the most appropriate way to publicize ideas through books, so many philosophical works and historical works appeared in this period. There are three historical works in the pre-Qin period: Zuo Zhuan, Mandarin and Warring States Policy. Next, let's introduce these works:

1. Introduction of Zuo Zhuan Zuo Zhuan was developed and refined on the basis of another famous book, Spring and Autumn Annals. Confucius wrote Chunqiu, mainly because the description of this book can be said to be the writing of Chunqiu. In Zuozhuan, it only takes one sentence to describe an article in Chunqiu. The general introduction of Spring and Autumn Annals is to let everyone know more about Zuo Zhuan. Describing their similarities, the difference lies not only in the details and sketches, but also in the time they recorded, which is the history of various countries dominated by Lu from 403 BC to 386 BC.

2. Introduction to Guoyu If the biggest difference between Guoyu and Zuozhuan is that Guoyu mainly remembers words, while Zuozhuan mainly remembers things. According to rumors, the author of Mandarin is also Zuo Qiuming, which belongs to the category of national history. The recorded time is from the mid-Western Zhou Dynasty to the mid-Spring and Autumn Period and the Warring States Period, and the country described is similar to Zuo Zhuan.

Three. Introduction to the Warring States Policy Warring States Policy is the most valuable work among the three. This book mainly contains the thoughts and strategies of military strategists from various countries during the Warring States period. Because it is included in a book, it is independent and the articles are not related.

These three works are the treasures of our country so far, which are helpful for us to study the history of the Spring and Autumn Period and the Warring States Period and understand their philosophical thoughts at that time.