In recent years, China has attached increasing importance to the topic of non-traditional security. The 14th Five-Year Plan clearly emphasizes for the first time “coordinating traditional and non-traditional security”. This is the first time that the term “non-traditional security” has been elevated to a position on par with traditional security, which fully reflects the profound changes facing the current international and domestic environment and has further bolstered China’s overall national security concept. In January 2021, the Academic Degrees Committee of the State Council approved the establishment of “National Security Studies”, which clearly stated that in order to cope with the challenges of traditional and non-traditional security, it is necessary to cultivate thinkers on national security. The field of “non-traditional security” is a relatively new field in international relations theory. At present, the more cutting-edge research is mainly concentrated in the United States, Japan and Singapore. The author of the book, Professor Yu Xiaofeng, director, at the Centre for Non-Traditional Security and Peaceful Development Studies (NTS-PD), Zhejiang University, is one of the few scholars in China who has deeply engaged in non-traditional security theory for more than twenty years. The publication of this book is not only of great contribution to the development of domestic non-traditional security theory, but also of invaluable practical significance.