Increasing attention is being directed toward understanding the impact of urban built environments on children’s health. The concept of the 15-minute city, or “15-minute life circle”, in China is significant; however, the needs of the pediatric population are often overlooked. Walkability and accessibility to urban service facilities are crucial for promoting children’s well-being. This paper focuses on the old city of Guilin in western China as a case study. It investigates the service facilities within a 15-minute life circle that affect children’s physical health, mental health, and social engagement. Utilizing the Walking Index method, this study assesses the walkability and rationality of these facilities in 621 neighborhoods. Data were gathered from 200 questionnaires and interviews with children, concentrating on their daily use of these facilities, supplemented by a multi-source analysis. The findings reveal that the Walking Index in the study area is generally low, with an uneven distribution, primarily influenced by road network density, block size, and urban landscape patterns. This study proposes the development of a “Children’s Healthy 15-minute Life Circle”, which would increase child-friendly service facilities, pedestrian infrastructure, and urban road network density. It also advocates for constructing service facilities that enhance children’s health and the optimization of the spatial arrangement of these facilities. Furthermore, it suggests the effective utilization of urban landscapes to create a diverse system of leisure spaces for children. This study offers valuable insights for enhancing the walkability of urban life circle service facilities and establishing a child-friendly city.

With the advancement of globalization and the interactions between cities globally, the region becomes a basic unit to break through the bottleneck of development and it is becoming a complex system that is inseparable from diverse factor flows. These flows reflect the interaction and can facilitate complementary advantages between cities but will also result in the unreasonable allocation of resources and unbalanced development. To achieve sustainable integration among cities within a region, different factor flows require high-frequency exchange while forming a coordinated effect. This research takes the Yangtze River Delta of China as the research scope, using geospatial analysis, social network analysis, and quantitative statistical analysis methods, selecting representative factor flows such as personnel, information, technology, and capital from 2010 to 2019 to observe the development and integration process within this region. It mainly discusses the development trend, spatial structure and differences of factor flows, the evolution of regional interaction networks, and the interrelationships of different factors to summarize the overall development process comprehensively and find some points that are not conducive to regional sustainable development from the perspective of interaction degree and coordinated effect by some indicators. The research explores a representative and densely populated region in China to provide certain references for regions worldwide through some policy implications.

With the advancement of globalization and the deepening interlock between cities globally, the research on urban culture and creative development should be expanded from a single city scale to regional and urban agglomeration scale. Creative clusters will become an important spatial scale to break the bottleneck of urban development in the future. In Europe, cities such as London, Paris, and Milan have developed creative industries and built creative clusters relatively early, and hence they gradually become global creative centers. However, there are few studies on the development of their creative industries from a regional perspective. This research uses multi-source data within the scope selected and based on comprehensive standards, to analyze regional development characteristics of creative industries in Milan, creative clusters formed with Milan as its core, and influencing factors of its development. Through the study of a global creative center from a regional perspective, references for emerging creative cities and those that require industrial transformation can be achieved.

Currently, China has entered the development stage of a “low birth rate” demographically. There is a huge contradiction between the unbalanced and inadequate distribution of preschool education facilities (PEFs) and the people’s expectations for “full and good education for children”. This study took the Lingui New District, a typical new urban area in West China as the research area, and through the introduction of POI big data and GIS analysis methods, supplemented by GeoDA Bivariate Moran index analyses, established a kindergarten spatial database. The study found that preschool education facilities have problems such as insufficient quantity, uneven quality, low service coverage, poor accessibility, etc. Therefore, it is suggested to increase the proportion of public affordable preschool education facilities including kindergartens and nurseries, optimize the spatial distribution of preschool education, and improve the accessibility of preschool services to promote affordable, safe, and high-quality development of preschool education and to provide reference suggestions for the revision of relevant standards and the adjustment of the layout of preschool education in undeveloped regions of China.

Despite the aesthetic potential of free-form envelopes in large-scale public buildings, geometric interlacing complexity, ambiguous façade boundaries, and constructability translation gaps persist as systemic barriers. This study addresses these challenges through a Design Science Research (DSR) approach, developing a rule-based digital twin methodology that maintains parametric intelligence across the building life cycle. Implemented via a five-layer integrated framework, i.e., geometric, parametric, BIM, coordination, and fabrication, the methodology was validated through a revelatory case study of the Shenzhen Bay Culture Plaza. Results demonstrate 91.2% clash resolution prior to construction, 20.3 million RMB in cost savings (10.8% reduction), and 35.4% schedule compression, while preserving rule-based relationships into operational facility management. The study advances BIM theory by operationalizing life-cycle digital twins for non-standard geometries, offering a replicable framework for future special-shaped construction projects.