This book was written by Mr. Lv Simian based on his teaching notes and historical research for many years. The content framework consists of introduction and five chapters, and each chapter is divided into several chapters. It describes in detail the history of the Washington Conference in China from ancient times to the 11th year of the Republic of China, including political history, socio-economic and cultural phenomena, and also describes the relations between countries, nationalities and China in Southeast Asia, Central Asia and West Asia.