As a mirror of the same resources belongs to a chronological history book. Chronological history books record historical events in chronological order, and record important events, people and changes in historical periods in units of years. Zi Tong Zhi Jian is a great chronicle work compiled by Sima Guang, a famous historian in the Northern Song Dynasty, which spans from the 23rd year of Wei Liewang Zhou in 403 BC to six years after Zhou Shizong entered Germany in 959 AD.