Sima Guang was born in 1019 in present-day Yuncheng, Shanxi to a wealthy family, and obtained early success as a scholar and officer. When he was barely twenty, he passed the Imperial examination with the highest rank of jinshi ('metropolitan graduate), and spent the next several years in official positions.

In 1064, Sima presented to Emperor Yingzong of Song a book of five volumes, the Liniantu or 'Chart of Successive Years'. It chronologically summarized events in Chinese history from 403 BCE to 959 CE, and was something like a prospectus for sponsorship of his ambitious project in historiography. These dates were chosen because 403 BCE was the beginning of the Warring States period, when the ancient State of Jin was subdivided, which eventually led to the establishment of the Qin Dynasty