Professor Li Jie of our school published his new book “Research on the Method and Practice of Maintaining National Unity Abroad” recently.The author first summarizes the current world consensus against separatism and the method and strategy of relevant countries, and then makes a theoretical evaluation. This book comprehensively analyzes the method and practice of safeguarding national unity in countries in Europe, Southeast Asia, South Asia and Africa from three aspects, which are coercion, interest compromise and system. Meanwhile the book shows multiple dimensions like anti-secession war, separation referendum, decentralization, compliance and internalization of territorial integrity norms, showing the complication of the current world division and anti-secession struggle.