2. The Book of Qi Yao Min: summarizes the production technology of agriculture, forestry, animal husbandry, sideline and fishery. It is convenient to understand the lifestyle of the ancients at that time.
Jia Sixie in the Northern Dynasties
3. Historical Records: Records the historical activities of emperors and generals from the legendary emperor to Emperor Wudi of the Han Dynasty for about 3,000 years. Affirming their merits also exposes their decay and sin. Historical Records has beautiful writing and vivid characters, and also has a lofty position in the history of literature.
Sima Qian in the Western Han Dynasty