## 1 Introduction
As urban expansion continues, identifying key nodes and regions in ecological network construction has become a research priority [21]. Prioritizing ecological issues is one of the core principles of ecological wisdom in conservation and restoration practices [22]. Ecological networks, as complex systems comprised of sources and corridors, exhibit significant differences in the area and spatial patterns of source areas, as well as in the length and cost-effectiveness of corridors [23]. By clarifying the focus of ecological network construction and management, it is possible to achieve comprehensive cost control while ensuring equivalent ecological benefits, thus reflecting ecological wisdom in urban governance. The Xiongan New Area is a crucial node for relieving the non-capital functions of Beijing and advancing the coordination of Beijing-Tianjin-Hebei, having been concerned greatly in planning and development [24]. The Xiongan New Area belongs to Baoding City, Hebei Province, offering an advantageous geographical position and abundant ecological resources. The Baiyang Lake wetland is the biggest freshwater lake on the North China Plain, holding an important status in water source conservation and biodiversity protection [25]. In the sense of rapid urbanization, it contains an extensive area in developing the Xiongan New Area. At the same time, although ecological priority has been brought forward in its development, irreversible damage to the urban ecological baseline has taken place, such as the destruction of forests and grasslands, habitat destruction, and water pollution, which pose a threat to the sustainable development of the city and region in the future. Therefore, maintaining environmental sustainability and achieving harmonious coexistence between cities and nature during large-scale urbanization is a major challenge that planners must address. Therefore, a major challenge for planners is to maintain the sustainability of ecological development amid large-scale rapid urbanization, achieving a harmonious coexistence between urban areas and nature [26]. Constructing an ecology ical network, which can enhance landscape connectivity and improve urban ecological resilience, would be an important strategy. By strategically laying out sources and corridors, it helps restrain urban development, identifies the priority areas for ecological restoration, and identifies key elements, along with cost control, contributing to a cohesive ecological safety framework [27]. Therefore, the purpose of this study is divided into the following parts:  
1. Use the ecological sensitivity assessment method to evaluate the ecological sensitivity of different land use types, providing a basis for the identification of ecological sources. 2. Identify patches with a significant impact on ecological connectivity through MSPA, including selection based on biodiversity potential, where natural elements such as water, wetlands, and trees serve as foreground elements, while cultivated land and construction land are taken as background elements to generate binary images. Then, GuidosToolbox 3.3 was used for MSPA classification and seven landscape elements were identified. 3. Employ the InVEST model to measure ecosystem service roles, evaluate habitat quality dimensions, and assess ecosystems' capacity to offer conditions conducive to survival and reproduction. 4. Utilize the Minimum Cumulative Resistance (MCR) model to construct potential ecological corridors, creating the lowest-cost pathways based on source areas and resistance surfaces. 5. According to the results of MSPA and the InVEST models, targeted ecological green space optimization suggestions were put forward. In summary, ecological networks within the city are key components for accomplishing the practice of sustainable urban development. In this case, during the development of the Xiongan New Area, balancing urbanization and natural growth harmoniously may be a great challenge for planners and decision-makers.