Chronological style: Chronological history books take the year and month as the order, the year and month as the longitude, and the facts as the latitude, which easily reflects the relationship between various historical events in the same period. The method of chronicle recording history originated in China. For example, Zuo Zhuan and Zi Tong Zhi Jian both belong to this category. Chunqiu is the earliest chronological history book in China.
Chronicle: Yuan Shu's Zi Zhi Tong Jian was founded in the Southern Song Dynasty. This genre is characterized by taking historical events as the key link and listing important historical events separately. Each article is written in the order of year, month and day. There are nine ancient books in the chronicle.
Country style: Country style history books are written in Mandarin. Country history books are historical essays written by some countries. It contains the history of many countries. For example, The Warring States Policy falls into this category.