In the early 1970s, the silk script "Warring States Characters" unearthed from Mawangdui Han Tomb in Changsha provided a new idea for the textual research of the author of "Warring States Policy". Many parts of this book are the same as or similar to the Warring States Policy, but the style is different. It mainly records Su Qin's life remarks, which is probably the compilation of the book mentioned by Zisu in the Annals of Literature and Art in Han Shu. However, the last part of the book is a compilation of all kinds of lobbying stories, just like Otawa's Warring States policy, and the last year of the book is Qin's attack on Chu, which seems to have been written during the Qin and Han Dynasties. In this way, the statement that "Warring States Policy" was written in "Express Pass" has another layer of fog.
The Shadow of the Warring States Policy