四川省城市级别划定：成都有望一线，绵阳三线，内江五线

Core Insights - Sichuan Province is undergoing a profound historical transformation in its urban landscape, characterized by multi-layered and differentiated development trends driven by the Chengdu-Chongqing economic circle [1][6] - The latest urban development assessment indicates that the rise of certain cities is reshaping the economic geography of the Bashu region [1] Group 1: Urban Development and Economic Growth - Yibin, located in the southern Sichuan urban cluster, has achieved a significant leap in urban capability due to the robust development of its power battery industry cluster [3] - Neijiang, positioned as the geometric center of the Chengdu-Chongqing economic circle, is seeking breakthroughs with its strategic positioning as the "heart of Chengdu-Chongqing" [3] - Neijiang has established a convenient transportation network that allows for half-hour access to Chengdu and Chongqing, with a total investment attraction exceeding 80 billion yuan in 2023 [3] Group 2: City Rankings and Economic Indicators - Dazhou, in the northeastern economic zone, is accelerating its development pace due to its advantageous location as a "gateway to the east and north" [5] - Mianyang, recognized for its strong technological capabilities, ranks first among third-tier cities with a score of 16.90, housing a quarter of the national military research institutes [5] - Chengdu, maintaining its position as the top new first-tier city, has a permanent population exceeding 21 million and a GDP surpassing 2 trillion yuan, with multiple trillion-yuan industry clusters [5] Group 3: Future Prospects - The urban development pattern in Sichuan Province is expected to continue evolving and upgrading under the strong impetus of the Chengdu-Chongqing economic circle, fostering more vibrant regional economic growth [6]