Population problems are always the global nature facing my country、Long -term and strategic problems。Beijing -Tianjin -Hebei region is the highest level of opening up in my country、The strongest innovation ability、One of the most populated areas，The main characteristics of the distribution of its population circle layer in -depth and its internal laws，Clarify the interactive relationship between population gathering and regional coordinated development，For the resolution of big cities、It has important and far -reaching significance to promote the high -quality development of the Beijing -Tianjin -Hebei urban agglomeration。"The Development of the Population of Beijing -Tianjin -Hebei in the International Perspective" (Yin Dewei Waiting，China Social Science Press, October 2021) A book based on the theory of the structure of the population circle，Based on local practice、Positioning global vision，Discussion from the level of academic theory and application of Beijing -Tianjin -Hebei population gathering evolution and Bet365 app download its coordinated development relationship with regional economy，It provides reference reference for understanding and exploring the balanced development of urban agglomerations。

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Beijing -Tianjin -Hebei urban agglomeration is one of the most densely populated areas in the country，At the same time, the population polarization effect is relatively prominent、Areas with large regional gaps。The book passes the informative data，vividly shows the new trend of population coordinated development in the Beijing -Tianjin -Hebei region in recent years: since 2015，The population of population in the Beijing -Tianjin -Hebei region has declined in the national proportion、The focus of the regional population has begun to move from the northeast of the region to the south、The proportion of the population of Beijing -Tianjin cities from rising and turning、New situation such as the adsorption force of the Beijing -Tianjin Corridor is significantly enhanced、New features。These characteristics provide us with important grasping points for us to grasp the coordinated development of the Beijing -Tianjin -Hebei urban agglomeration.。

Of course，Understanding the population phenomenon of the Beijing -Tianjin -Hebei urban agglomeration cannot be limited to just one hoe，The highlight of the book is that insisting on "Jumping out of Beijing, Tianjin, Hebei to see Bet365 lotto review Beijing -Tianjin -Hebei"，Reveal from the comparative analysis of the national urban agglomeration and the comprehensive vision of the global urban circle，The characteristics of understanding and exploring the balanced development of regional population and its regularity。The author uses exploration space data analysis and other methods，A comprehensive analysis of the dynamic evolution characteristics of the population distribution of my country's representative urban agglomeration, including the Beijing -Tianjin -Hebei urban agglomeration。Research results show，Most urban agglomerations in our country are experiencing the development process of the polarization from the central city to the polarization of the urban agglomeration to the regional group.。During the entire development process，Population scale gathering effect always maintains a certain circular symmetry，That is, the population attractive aggregation ability is constantly spreading to the external circle，The scale aggregation effect of the urban agglomeration declines，Finally, the overall competitiveness of the urban agglomeration is improved。The population evolution of the Beijing -Tianjin -Hebei urban agglomeration is exactly the vivid manifestation of such a development process。

Further expands the field of vision to the global Bet365 app download urban group，By comparing the Beijing -Tianjin -Hebei urban agglomeration and northeast urban agglomeration of North America、Tokyo Metropolis Circle、Toronto Metropolis Circle and other urban circles and other urban circles change characteristics change characteristics，The author discovered "the population proportion of the population of the city group's population in the center of gravity wave", "the demographic ratio of 30 kilometers in the central city radius", "the distribution of population space from drastic changes to stability to about 50 years" and other urban agglomerations Related laws of population evolution，The necessity of promoting the transformation of the "single city" planning to the "global" urban agglomeration regional planning。These discoveries on the one hand deeply reveal the population distribution of Beijing -Tianjin -Hebei、Inner logic of gathering and diffusion，On the other hand, in order to analyze and judge the future development trend of Beijing -Tianjin -Hebei，Promote the balanced and coordinated development of the population of the Beijing -Tianjin -Hebei circle at a higher level，Provided basic follow。

　　Persist in exploring regional development problems in the population circle 

The book shows the consistent policy feelings of Chinese population researchers，That is how to promote the coordinated development of the Beijing -Tianjin Bet365 lotto review -Hebei population，I have proposed several policy recommendations。Pointing in the book，Facing the population risks and development trends faced by the Beijing -Tianjin -Hebei urban agglomeration and the cities in the center，We must always insist on thinking and exploring problems in the population circle，Fighting at the level of public service level in Laqi urban agglomeration、Plan the urban agglomeration node city misalignment development、Innovative urban governance system and mechanism、Cultivate the toughness of the city's population、Enhance the vitality of the regional circle、Construction of the "micro center" of the population of the population，closely combining regional development with population development，Fighting Beijing -Tianjin -Hebei Coordinated Development Active Battle。

The so -called "Yingcheng Gathering People"，refers，Of course，Excessive population gathering will also bring a series of problems to the city。How do you think of the relationship between population and urban space，This book provides us with a new perspective of understanding this problem -circle structure theory。Here，"Circle" reflects the heart，"Layers" reveals the differences，Show the inherent relationship of population gathers in the circle，Time analysis of the population circle Bet365 app download and comparison of commonality，We can clearly outline the complex relationship between population and urban agglomeration space，to provide a basis for the formulation of urban planning and population development policies。

In short，This book puts the population problem in the overall economic and social development situation，Put in regional collaboration、Studies in the pattern of national development and global competition，There are in -depth and meticulous empirical analysis，There is also a systematic strict policy discussion; both expand and enrich the theory of the circle structure，It also interpreted and explained the theoretical logic of the central government on the coordinated development of Beijing -Tianjin -Hebei，It is worth reading。

　(Author Unit: Department of Sociology at Peking University)