1. bamboo records, including ancient bamboo records and new bamboo records.
2. Mawangdui's silk book "Letters from the Vertical and Horizontal Family". After reading this book, you will know that Sima Qian made a mistake about Su Qin, the first strategist in the Warring States Period. Most of the vertical and horizontal family letters are letters from Su Qin, Yan Wang and Qi Wang, and these languages are much more sincere than the historical books compiled by later generations.
Scholars do more textual research. Personally, they admire Mr Yang Kuan, Mr Shen Changyun and Mr Tang Lan very much. For example, Yang Kuan's History of the Western Zhou Dynasty, History of the Warring States Period, New Exploration of Ancient History, Zhao's Historical Draft, History and Civilization of the Warring States Period, Rising Stars, Four Classics of the Yellow Emperor, Letters of the Warring States Period, Stories of the Spring and Autumn Period, and A Brief Introduction to the History of Bronze inscriptions in the Western Zhou Dynasty.
The novel recommends Sun Haohui's "Daqin Empire", which is the first historical novel in China at present. The History of the Eastern Zhou Dynasty can be described as a major event, and it is not limited to trivial matters. Most of the details of life in it are from the Ming Dynasty. If you are too arrogant about the historical environment, you may be unbearable.