The words of historians quoted in "Guoyu" and "Zuo Zhuan" were not blurted out by the historians, but quotes summarized and passed down from generation to generation.

"Guoyu" is said to be a national-style work written by Zuo Qiuming during the Spring and Autumn Period. His compilation method is based on national classification, focusing on languages, hence the name "Guoyu".

In the Tang Dynasty, some people began to question whether it was compiled by Liu Xiangxu of the Western Han Dynasty, or it was compiled by many people in different historical periods. Many scholars in modern times, including Kang Youwei, suspected that it was the Warring States or Han Dynasty. Later scholars compiled and edited the original materials recorded by historians from various countries during the Spring and Autumn Period, which will be questioned and verified.

The record range of this work starts from King Zhou Mu’s twelfth year (990 BC) when he conquered the Quanrong in the west (about 947 BC), and ends with Zhibo’s destruction (453 BC). "Guoyu" includes court engagements, banquets, satires, debates, responses and some historical events and legends among nobles from various countries. "Guoyu" is my country's first national style history book.

"Zuo Zhuan" was originally written by Zuo Qiu Ming during the Spring and Autumn Period. Modern people believe that it was compiled by people during the Warring States Period. It is a chronological history book with a complete narrative in ancient China, and it is also a representative of pre-Qin prose works. . The original title of the work was "Zuo Shi Chun Qiu". In the Han Dynasty, it was renamed "Chun Qiu Zuo Shi Zhuan", "Chun Qiu Nei Zhuan" and "Zuo Shi Zhuan". After the Han Dynasty, it was often called "Zuo Shi Zhuan". It is one of the important classics of Confucianism and an important history book studied by Confucian and guest students of all ages. Together with "Gongyang Zhuan" and "Gu Liang Zhuan", it is called the "Three Biography of the Spring and Autumn Period".

"Zuo Zhuan" is essentially an independently written historical literary work. It begins in the first year of Lu Yin (722 BC) and ends in the 27th year of Lu Aigong (468 BC). year), based on the Spring and Autumn Period, it explains the outline of the Spring and Autumn Period by describing the specific historical facts of the Spring and Autumn Period.