From the perspective of humanities and social sciences, this book focuses on the background, development and basic rules of the geographical evolution within Beijing, Tianjin and Hebei provinces, analyzes the interrelationship among the three provinces in the aspects of ecological environment, politics, economy, military, culture and society, and discusses the important theoretical issues such as to what extent the geographical evolution promotes or restricts the social development of their respective regions, which not only promotes academic progress in related disciplines, but also provides decision-making reference and theoretical support for regional development.

Donghu Sun, Researcher of Beijing Academy of Social Sciences, Research librarian of Beijing Research Centre for Literature and History, President of the Beijing Historical Research Association. Engaged in research on historical geography, toponymy and regional history. Sun is the author of more than 20 books, including Study on the Changes of Beijing's Ecological Environment in the Last Thousand Years, History of the Development of Geographical Names in Beijing, etc. And he has published more than one hundred essays.