京津冀协同发展十余年，为何还需“首都都市圈”？

Core Viewpoint - The formation of urban agglomerations is a necessary outcome of the development of core cities, driven by the need for collaboration with surrounding areas to achieve functional optimization and new growth momentum [1][7]. Summary by Sections Urban Agglomeration Planning - The "Modern Capital Urban Agglomeration Spatial Coordination Plan (2023-2035)" has been approved, covering approximately 42,000 square kilometers, including Beijing, Tianjin, and parts of Hebei [2]. - Since the concept of urban agglomeration was first introduced in 2014, it has become a key direction for regional economic development in China, with 20 national-level urban agglomerations approved by 2021 [2]. Structure and Design of the Capital Urban Agglomeration - The plan establishes a structure of "one core, two wings, dual cities, multiple points, and multiple corridors," with Beijing as the core and Xiong'an New Area and the Beijing sub-center as the wings [8]. - The urban agglomeration is designed to go beyond a one-hour commuting circle, creating a nested structure of multiple layers based on spatial distance and functional positioning [8][9]. Economic and Functional Integration - The capital urban agglomeration aims to optimize and enhance the functions of the capital, serving as a key engine for the coordinated development of the Beijing-Tianjin-Hebei region [9][12]. - The total area of the capital urban agglomeration is the largest among the 20 approved national urban agglomerations, with a focus on optimizing the core functions of Beijing [9][10]. Challenges and Future Directions - The effective area for urban agglomeration development is limited due to the inclusion of ecological protection zones and mountainous areas, which are not suitable for concentrated development [10]. - The relationship between the capital urban agglomeration and the Shijiazhuang urban agglomeration is based on tight industrial interaction and cooperation, emphasizing the need for deep collaboration in industrial development [16][17]. Innovation and Technology - The construction of the capital urban agglomeration is aligned with the goal of establishing Beijing as a national center for technological innovation, facilitating the diffusion of innovation resources to surrounding areas [14][18]. - The focus has shifted from merely alleviating "big city problems" to fostering deep integration and collaboration among cities, with an emphasis on innovation and public services as core drivers [13][14].