This book not only aims to describe the thought-provoking process expressed by the eye-catching word "revealing", but also aims to reveal to readers through the content of the book the relationships between people in that era and the changes in human nature made by people under the influence of the environment, so as to warn readers rather than directly preach. If after reading this book, someone can make some progress in their insight into human nature, or wake up and correct their evil ways, then the original intention of publishing this book will be fulfilled.
Purpose: Observe the evolution of the customs of the times in the palace