This book is a strategy classic compiled by Tang Dynasty scholar Zhao Rui, also known as "Reverse Classics". The whole book covers politics, military, diplomacy, life and other fields, advocating adapting to the times, being flexible and breaking the shackles of traditional Confucianism. By analyzing cases of success and failure in history, we summarize the essence of the study of emperors and strategies, and put forward the core point of view that "sages can adapt to changing circumstances and adapt to changing circumstances." The white-text version is easy to understand. It not only retains the profound thoughts of the original work, but also makes it easier for modern readers to study. It has great inspiration for future generations in governing the country and conducting themselves in the world.