The tourism development of industrial heritage is an effective way to activate cultural heritage and can provide new solutions for the renewal and protection of industrial heritage. This study focuses on the industrial heritage in Nanjing, aiming to explore its spatial distribution pattern, tourism development strategy, and sustainable development model. This study adopts a combination of quantitative and qualitative research methods. First, relevant information on 93 sites of industrial heritage type historic buildings in Nanjing is collected. Secondly, ArcGIS was used to visualize the evolution of industrial buildings and the spatial distribution of industrial heritage type historic buildings. Finally, the spatial analysis tools of ArcGIS and the accessibility analysis method in space syntax theory are superimposed to comprehensively analyze the spatial distribution pattern and traffic accessibility characteristics of Nanjing’s industrial heritage. The research results propose a specific plan to promote the value transformation of industrial heritage through tourism: based on the spatial distribution characteristics of Nanjing’s industrial heritage along the water system and traffic arteries, a tourist route of “multi-point, two-axis, one-center” is planned; the tourism development strategy of “point protrusion, linear links, and surface darning” is implemented; and a sustainable development model under the guidance of low-carbon environmental protection goals is explored. This study provides a reference for the protective development of industrial heritage and the expansion of tourism and opens up a new perspective for the regeneration and planning of other urban heritage.

The rebirth of educational architectural heritage plays an important role in the urban tourism economy, and studying the integration of educational heritage and tourism is of great significance and value. This article selects the educational heritage in Nanjing, China, from 1840 to 1952 as its research object to explore the integration and sustainable development relationship between heritage utilization and tourism. This article adopts a research method that combines qualitative and quantitative methods. First, it collects historical data and conducts on-site surveys to obtain information on 117 important educational heritage sites in Nanjing. Then, it uses ArcGIS technology to quantitatively analyze the evolution rules of modern educational buildings in Nanjing and the spatiotemporal distribution characteristics of the heritage. Finally, a cultural tourism strategy is proposed based on heritage characteristics and government policies. The research results reveal the interdependence and sustainable development relationship between the protection and utilization of educational heritage and tourism: according to the distribution characteristics of the heritage in the urban space, the "educational heritage tourism path" of the ancient city is constructed, which can promote the development of urban tourism. Subsequently, the economic value created by tourism is used to "feed back" heritage protection. This research result provides reference for educational heritage tourism in other cities in China and around the world.

In the face of the increasingly deteriorating global environment, the sustainability of building systems has become a major research topic. This paper presents sustainability research on large-scale building cases from the perspectives of ecological emergy value and carbon emissions. Specifically, by calculating the emergy value and carbon emissions throughout the entire life cycle of the building system, a quantitative analysis of sustainability based on the LCA–emergy–carbon-emissions framework is completed. The results indicate that from the perspectives of both emergy value (over 80%) and carbon emissions (over 90%), the operational stage and the building-material-production stage are the controlling factors. Retrofit design strategies help enhance the sustainability performance of the building system, but different types of design strategies have different effects. The landscape-transformation-design strategy (strategy A) significantly improves the ecological sustainability of the building system, the equipment-improvement strategy (strategy B) helps reduce the carbon emissions of the building system, while the infrastructure-renewal strategy not only has a weaker impact on sustainability improvement but also generates the highest carbon emissions. Additionally, with the aim of controlling carbon emissions, the integration of solar clean energy sources contributes to the overall sustainability of the building system, providing references for architects and building managers.