Spanning from pre-Qin period to the Qing Dynasty, this book reveals the core problems that led to the downfall of each dynasty. It could be the talent selection mechanism that hindered social mobility, or the land annexation that had been constantly suppressed but only intensified. Over 3,000 years, these problems haunted Chinese feudal dynasties. Each dynasty might come up some solutions, which temporarily prevented the outbreak of problems but brought about bigger problems. By parsing these problems, this book constructs a complete and profound history of China with a clear logic and a fresh perspective.