History was a broad subject that involved many different fields. As a second-year liberal arts student, he should start to study history seriously to understand the development and evolution of Chinese history. As for the book, I think it's a good textbook for understanding modern Chinese history. This book narrated the 30 years of history since China's reform and opening up, covering economic, political, cultural and many other aspects. Through reading this book, one could gain an in-depth understanding of China's historical changes and social development. Other than Thirty Years of Agitation, there are many other excellent history books for you to choose from. For example, you could read classics like " Records of the Historian " and " The Political Gains and Losses of Chinese Past Dynasties " to understand the history of ancient and modern China. You can also pay attention to some historical research papers and historical documentaries to gain a deeper understanding of Chinese history and culture. Learning history is very important. It can help us better understand the world and the development of human civilization. I hope you can read and study history seriously and become a history lover with depth and breadth.