国家级都市圈增至18个，后备军还有哪些？

Core Insights - The Long Spring Urban Circle in Jilin Province has been officially recognized as a national-level urban circle, increasing the total number of such urban circles in China to 18 [1][2] - The Long Spring Urban Circle aims to achieve an economic total of approximately 1.35 trillion yuan by 2030, with significant improvements in regional integration and urban functionality [2][3] - The development of urban circles is a key focus for the Chinese government, with ongoing efforts to enhance urban governance and promote coordinated development among cities [6][7] Summary by Sections Long Spring Urban Circle Development - The Long Spring Urban Circle, centered around Changchun, includes Jilin City, Siping, and Liao Yuan, covering an area of approximately 29,700 square kilometers with a resident population of about 12.1 million [1] - The development plan for the Long Spring Urban Circle was approved by the National Development and Reform Commission and aims to enhance the economic and social integration of the region [2] Economic Goals and Impact - By 2030, the Long Spring Urban Circle is expected to reach an economic output of around 1.35 trillion yuan, significantly contributing to the overall economic growth of Jilin Province [2] - Changchun City alone is projected to account for 53.1% of Jilin's GDP in 2024, highlighting the urban circle's critical role in the province's economic landscape [2] Future Urban Circles - As of now, 15 out of 22 major cities in China have been designated as national-level urban circles, with notable cities like Kunming and Harbin still awaiting recognition [3][4] - The government is actively promoting the development of urban circles, with plans for Kunming's urban circle already underway [4][5] Broader Urban Development Strategy - The Chinese government emphasizes the importance of urban circles in enhancing urban governance and promoting coordinated development among cities, as outlined in various national policies [6][7] - The Long Triangle region is also focusing on urban circle development as a priority for the next five years, aiming for integrated urban growth [7]