This book is a collection of two books by Mr. Cao Juren. The first, "Nearly a Hundred Years of Chinese History," serves as a modern history reader, covering the mid-19th century to the rise of the Anti-Japanese War, featuring important historical figures and events such as Li Hongzhang, Kang Youwei, the Sino-Japanese War, the May Fourth Movement, and more. The second book, "Chinese History ABC," is a beginner's guide to Chinese history, divided into two parts. The first part introduces the content of Chinese historical books, while the second part explores research methods and systems of Chinese historiography, providing basic knowledge and scientific methods for exploring and understanding the truth of history.