Further expansion of national metropolitan areas. Recently, the Xi'an metropolitan area development plan was officially approved. Xi'an has become the fifth national metropolitan area after Fuzhou, Nanjing, Chengdu and Chang Zhu Tan metropolitan areas. The reporter of the economic information daily learned that the development plan of Chongqing metropolitan area has been reported to the national development and Reform Commission, the application for metropolitan area planning in Wuhan, Shenyang, Guangzhou and other places is being vigorously promoted, and the metropolitan area planning in Zhengzhou and other places is also stepping up the preparation. Insiders pointed out that pressing the "fast forward" key in the construction of metropolitan area will play an important role in driving the economy. In the next step, China will also cultivate more metropolitan areas in the East, central, West and northeast to better play a leading role and drive regional development. "At present and for some time to come, urban agglomerations and metropolitan areas will become an important engine to drive the high-quality development of regional economy." Ni Pengfei, director of the city and competitiveness research center of the Chinese Academy of Social Sciences, told the reporter of the economic reference daily that the metropolitan area can not only improve the regional energy level, but also expand the regional total, enhance regional functions and promote regional common prosperity. From the approved development of metropolitan area, this polar core function has been highlighted. The 10 regions have achieved a total regional GDP of 4666.568 billion yuan, and the total economic output has expanded by 491.5 billion yuan over the previous year. The economic development shows strong resilience, highlights the characteristics of high-quality development, and the degree of integration has continued to improve, so as to achieve a good start in the development of the 14th five year plan - this is the development answer paper handed over by Nanjing metropolitan area in the past year. According to the analysis of Sichuan Provincial Bureau of statistics, the total economic volume of Chengdu metropolitan area in 2021 increased by 8.6% over the previous year, and the growth rate was 0.4 percentage points higher than the average level of Sichuan Province. New breakthroughs were made in the level of development, and the per capita GDP reached 80000 yuan and 13000 US dollars, reaching the level of middle-income regions in the world. This is only one side of the metropolitan area leading regional development. In terms of regional pattern guidance, clear positioning and objectives are set in relevant development plans. For example, one belt, one road from the national development and Reform Commission to the Xi'an metropolitan area, is to define the four positions of Xi'an metropolitan area, namely, to enhance the supporting ability of the metropolitan area to the construction of the Guanzhong plain city group, to better push forward the new era, to promote the new pattern of the western development, to better serve the ecological protection and quality development of the Yellow River River Basin, and to better integrate into the "one belt and one road". The three-year action plan of Liaoning Province to promote the coordinated regional development of "one circle, one belt and two regions" shows that Shenyang metropolitan area will become a leading area for the all-round revitalization of Northeast China. "The metropolitan area is also an important carrier for expanding consumption and investment demand." Chen Ming, deputy director of the academician studio of China Academy of urban planning and design, has participated in the formulation of several metropolitan area plans such as Xi'an metropolitan area development plan. He said that different from the development of simple urbanization and urbanization, the metropolitan area is "construction" first, and the first emphasis is convenient commuting. Therefore, the construction of metropolitan area will open up a lot of space in regional transportation infrastructure. For example, develop urban (suburban) railways, explore the appropriate extension of rail transit in central cities to surrounding cities, and promote the "one network" operation and management of rail transit. According to the travel demand, we will promote the urbanization of intercity highways and the transit of intercity passenger transport in an orderly manner. This idea of traffic first can be seen from the planning of Xi'an. During the 14th Five Year Plan period, Xi'an plans to transform 140 kilometers of high-speed radiation lines, build 238 kilometers of high-speed loop lines and connecting lines, 170.4 kilometers of subway and 17.5 kilometers of tram in five years... By 2025, Xi'an metropolitan area will basically realize one hour commuting. In the list of major projects in Chengdu metropolitan area, the largest project investment is also in the field of infrastructure, involving 72 projects with a total investment of 739.3 billion yuan, including the "one ring and three shooting" rail transit backbone networks such as Chengdu outer ring railway, Chengdu Deyang, Meishan and Ziyang City (suburban) railway, and the capacity expansion of Chengdu Mianyang, Chengdu Nanjing and Chengdu Leshan expressway. In addition to promoting the "integration" of transportation, some people in the industry also said that the development of metropolitan area also needs to guide the supporting of industrial echelons and the sharing of life convenience. Experts said that the central area should build high-end service industry and headquarters cluster, and gather headquarters economy, financial services, R & D center, business exhibition, etc. The manufacturing industry will shift to the surrounding areas, guide the middle areas to actively develop manufacturing industries and links with high added value, and promote industrial transformation and upgrading. At the same time, for peripheral areas, we should speed up the development of supporting industries in service center areas and intermediate areas. In terms of public services, metropolitan areas should further promote connectivity and mutual recognition of government services and social security; We should improve the coordination and support capacity in the region, such as jointly building and sharing logistics infrastructure such as cold chain centralized distribution center, and exploring cross administrative services such as energy, communication and emergency rescue. The reporter learned that several national metropolitan areas have plans for this. In the future, Chengdu metropolitan area will build Chengde Industrial Cooperation Demonstration Park, Chengmei cross regional pickle seasoning industry cluster, southwest special vehicle and spare parts production base, Pengshi Chuanxiong modern agricultural industrial park, Pudan urban modern agricultural integration development demonstration zone and other projects, covering key fields such as manufacturing industry, modern service industry and modern agriculture. Nanjing metropolitan area is to integrate the existing industrial foundation and advantageous resources in various regions of the metropolitan area, build a reasonable industrial structure gradient, form a complete industrial chain and advantageous industrial clusters, and explore the construction of cross regional cooperation and development platform. "Although the development planning of the metropolitan area takes the lead, at present, there are still many bottlenecks and problems in building a modern metropolitan area." Chen Ming said that for example, some cities do not have a strong sense of active integration, there are administrative division barriers, the willingness of industrial, capital and technology spillovers in central big cities is not strong, and the surrounding small and medium-sized cities are not sincere enough to take the initiative to undertake transfer and are unwilling to "follow suit". In the next step, each metropolitan area and each part should have the vision of overall development, coordinate with each other and complement each other's advantages, so as to promote the real high-quality development of the region. (Xinhua News Agency)