The report of the 19th National Congress of the Communist Party of China pointed out，Constructing an urban pattern with coordinated development of large, medium and small cities and small towns with bet365 free bets as the main body。current，With Beijing, Tianjin and Hebei、Yangtze River Delta、Guangdong-Hong Kong-Macao Greater Bay Area、bet365 free bets or metropolitan areas represented by Shandong Peninsula, etc.，It has become the most important position for gathering production factors and driving regional economic growth in our country。In the context of the deepening level of regional integration，Even in Beijing、Shanghai、Guangzhou and other traditional "mega cities" and "first-tier cities"，We must also increasingly rely on the resource integration capabilities and regional radiation effects of the urban agglomeration where it is located，To strive to win city competitions nationwide and even globally。Achieve high-quality development of bet365 free bets and the coordination and win-win of large, medium and small cities within them，Not only contributes to the improvement of the urban agglomeration’s own competitiveness and the sustainable development of the economy and society，And to boost overall domestic demand，Finally realize the transformation of economic development mode，Is of important strategic significance。

　Optimizing the spatial structure of bet365 free bets

High-quality development of bet365 free bets mainly includes economic efficiency、Three connotations of regional coordination and environmental friendliness。Economic efficiency means that the urban agglomeration as a whole has stronger industrial competitiveness and higher per capita income (output) level。Regional coordination is to avoid excessive “one city dominating” within provinces, regions or bet365 free bets，And continue to narrow the regional economic gap or control it within a reasonable range，This is also conducive to the healthy development of the county economy and the implementation of the rural revitalization strategy。The key to environmental friendliness is，Minimize pollution emissions as much as possible in the process of urbanization and regional economic development，Achieve intensive utilization of resources，This requires that the urban population and economic activity concentration do not exceed the carrying capacity of the regional ecological environment。Achieve high-quality development in the above aspects，Depends on the optimization of the spatial structure of bet365 free bets，That is, we must choose a reasonable spatial model for the future urbanization process。

For a large developing country like China with a vast territory and huge population，Suitable for implementing the “multi-center integration” urban agglomeration layout strategy，In the context of regional economic integration，Achieve polycentric urban agglomeration spatial structure layout。"Polycentric" means within a single urban agglomeration，It is not appropriate to over-concentrate population and economic activities in a single megacity，Instead, mutual lending of scale should be developed、Multiple centers with complementary functions and industrial interaction、Networked city group system pattern。“Integration” emphasizes breaking down administrative barriers within bet365 free bets，Eliminate policy differences，Strengthen inter-regional cooperation，Promote inter-city production、Comprehensive cooperation in the fields of commerce, trade and transportation，The real implementation lies in the infrastructure、Market System、Interconnection and open sharing in various aspects including policies and measures。The polycentric spatial structure is integrated with the integrated development model，Can be in a wider regional market，Make fuller use of the respective resource endowments and industrial advantages of large cities and small and medium-sized cities，Let large, medium and small cities form complementary functions，Healthy competition between central (or sub-central) cities，Improve regional economic efficiency while narrowing the development gap between cities，Achieving coordinated regional development。

　Improving the quality of regional comprehensive bet365 free bets

Integration itself is to break down market barriers in various places，The process of connecting different regional markets within an urban agglomeration，It will increase the competitive intensity of various industries in the region。Compared with the integration of single-center bet365 free bets，Multi-center integration is easier to promote between cities，Especially central (or sub-center) cities are developing import and export markets、Develop high-end industries、Fierce competition in attracting the population, especially highly skilled talents, etc.。Due to the close geographical distance within the urban agglomeration，High degree of market integration，Between multiple large cities in the same urban agglomeration，Industrial competition is usually more obvious than in large cities belonging to different bet365 free bets。Especially financial services mainly located in regional central cities、Technology Services、High-end industries such as high-tech manufacturing，Subtle differences in products or services have a great impact on corporate profits，And the total market demand in a specific area is limited，Multi-center bet365 free bets will make high-end industry companies more widely distributed、More quantities、The market competition is more intense，Promote the survival of the fittest and improve efficiency within the industry，Improve the industrial competitiveness and product added value of bet365 free bets, especially central (or sub-central) cities。

The multi-center integration of bet365 free bets will enhance the comprehensive development quality of the region through a sharing mechanism。Integration of markets and investment reduces the exclusivity of public goods between regions，Objects that can be shared by different cities mainly include the following two categories。The first category is infrastructure, especially large-scale transportation and logistics facilities。For example，Seaport、Large civil airports are usually built in central cities or transportation hub cities within bet365 free bets，And allow residents and businesses in other cities to use。A single-center urban agglomeration tends to concentrate too much infrastructure in the central city，Existing usage load is high、The problem of high maintenance costs，This will also lead to the situation of "distant water cannot quench the near thirst" in some cities far away from the center。The multi-center integrated urban agglomeration can disperse airports and other infrastructure in several sub-center cities，For example, the Yangtze River Delta urban agglomeration currently includes Shanghai Pudong、Nanjing Lukou、Hangzhou Xiaoshan and many other 4F civil airports，The Shandong Peninsula city agglomeration, which is famous for its maritime transportation, owns Qingdao、Yantai、Rizhao、Weihai and other large-scale cargo seaports，To a large extent, it avoids the problem of oversupply or inconvenient utilization caused by over-centralization of infrastructure。The second category is the broader labor market。Because knowledge-intensive industries are mostly concentrated in the center (or sub-center) cities of bet365 free bets，The region has become a “main force” in attracting highly skilled labor force，So compared to a single-center urban agglomeration，Multi-center integrated bet365 free bets usually provide workers with more choices of employment locations，Can attract high-skilled talents from various industries in a "multi-point" manner。At the same time，Regional integration can also ensure that workers can easily purchase products and services provided by other cities。Shanghai in the Yangtze River Delta urban agglomeration、Nanjing、Hangzhou、Suzhou，Guangzhou in the Pearl River Delta、Shenzhen、Zhuhai，They are all key cities that attract immigrants, especially highly skilled talents, to settle down and start a business，And formed a regional brand effect that attracts more people to come here for employment and entrepreneurship。

　Promote coordinated regional bet365 free bets

The multi-center integrated development of bet365 free bets will help narrow the income gap between regions，Promote coordinated regional development。Integration and facilitation of markets and investments，Contributed to product、Technical levels and prices of production factors, including labor wages, converge across different regions。Therefore，Regional economic integration itself is to promote regional coordination、An important mechanism to reduce regional economic disparity。The spatial structure of polycentric bet365 free bets will further release the role of economic integration in promoting coordinated regional development。When there is an agglomeration advantage，On the one hand, the spatial concentration of factors and population will lead to the relative concentration of high income and high productivity in individual geographical areas，And self-reinforcing this geographical concentration of high incomes and spatial inequality through the siphon effect，On the other hand, it will also have a positive spillover (radiation) effect around the gathering place。For bet365 free bets，This "individual area" is the central city of the urban agglomeration。bet365 free bets with a single central spatial structure will have a larger population、Factors (especially high-quality production factors) are invested in a single central city，Agglomeration advantages and spillover effects can only exist in and around this central city。Polycentric urban agglomeration can distribute the population and elements more balancedly in more than one central city，This allows the high income and high productivity brought about by spatial agglomeration to appear in more locations，Then the spillover effect occurs through multiple cities simultaneously，Benefiting more small and medium-sized cities (towns) in the region，Increase the income level of small and medium-sized cities，Narrow the economic development gap between them and central cities。Driving small and medium-sized cities through big cities，Small and medium-sized cities radiate to surrounding villages，Achieve coordinated regional development and rural revitalization。

The development experience of the Yangtze River Delta urban agglomeration deserves attention。On the one hand，The Yangtze River Delta urban agglomeration has obvious polycentric characteristics。Shanghai is the largest city in the urban agglomeration、At the same time in the core city，Nanjing、Hangzhou、Suzhou、Ningbo and other large cities also play the role of secondary centers to a large extent，Foreign trade with Shanghai、High-end industry、Attracting talents and other aspects have formed a pattern of coexistence of complementarity and competition，At the same time, it also complements Shanghai in terms of geographical influence。For example, Nanjing treats Wuhu in the Yangtze River Delta urban agglomeration、Ma'anshan、The economic radiation effect of Zhenjiang and other places，Stronger than Shanghai in many aspects。On the other hand，The integrated development of the Yangtze River Delta urban agglomeration is also very typical。Long time，The members of the urban agglomeration have a high degree of industrial correlation，Many southern Jiangsu、The leading industries of small and medium-sized cities in northern Zhejiang can be connected with the industries of central cities such as Shanghai, Nanjing and Hangzhou，Or undertook the transfer of manufacturing industries from central cities，High level of production integration。In addition，On the highway in the Yangtze River Delta region、Railway、High-speed rail、Complete infrastructure in water transportation and other areas，Convenient and fast material transportation and population movement between regions，High degree of integration of transportation。This multi-center integrated development model，Promoted Shanghai、Nanjing、Healthy competition among big cities such as Hangzhou，Relieving population congestion in Shanghai，It also helps small and medium-sized cities to better utilize the positive spillover effects of surrounding large cities。This makes the Yangtze River Delta urban agglomeration one of the bet365 free bets with the highest level of economic development and the most attractive population in my country，At the same time, it also has relatively controllable internal regional development gaps and urban-rural income gaps，And it also maintains a relatively high-quality and healthy ecological environment。

　(This article is a phased result of the National Social Science Fund key project "Research on the Formation Mechanism and Economic Impact of bet365 free bets System Scale Distribution in China's Economic Transformation" (18AJL010)

(The author is a professor bet365 free bets School of Economics and Management, Southeast University；Associate professor, School of Economics, Shandong University of Finance and Economics)