Residential heritage neighborhoods in China are experiencing a transformation from large-scale demolishment, which is associated with relocating residents, to small-scale neighborhood regeneration, and distinctive models of participatory regeneration are emerging. Participatory regeneration is increasingly considered to be an effective way to achieve multiple goals in urban development; however, little research has investigated the impacts of participatory regeneration on achieving neighborhood-based collaborative governance. This study aims to explore which mechanisms associated with participatory regeneration facilitate or constrain neighborhood-based collaborative governance, using case studies in Shanghai. Based on the investigation of three nuanced pathways in participatory regeneration, this study compares four dimensions associated with participatory regeneration (i.e., participatory decision-making, inclusion, collective problem-solving, and power-sharing) and explores key mechanisms that are applicable for achieving collaborative governance in different scenarios, aiming to enhance social development and social sustainability in future. The findings indicate that although grassroots government played vital roles in participatory heritage neighborhood regeneration through financial support and supervision strategies, facilitating mechanisms could still be observed for achieving collaborative governance. Furthermore, this study provides suggestions for planners in building collaborative governance in other developing areas which are experiencing rapid urbanization with strong state interventions.

In the process of urban development and regeneration, a city always gradually derives multiple morphological characteristics from its original single form. The transformation of urban form can be viewed as representation of consequence of overlapping of cultural attributes, an urban quality which is often ignored by property developments. This paper addresses that culture is a starting point to analyze traditional urban forms of Chinese and Southeast Asian traditional port cities. On the one hand, it analyzes their urban morphological characteristics focusing on the urban tissue level, which can reflect a process of urban evolution based on multi-culture brought by the ancient maritime trade. On the other hand, four port cities with similar cultural attributes including Quanzhou and Guangzhou in China, Hanoi in Vietnam and Malacca in Malaysia are analyzed comparatively to demonstrate their morphological differences and similarities. Based on the analysis of the two aspects, the paper recovers the relationship between cultural attributes and urban morphology, as well as some universal and special rules of urban development.

In the post-pandemic context, data-driven design interventions that can endow architectural spaces with mixed-use and open characteristics that are adaptable and environmentally resilient are increasingly important. Ubiquitous semi-public architecture, such as hotel buildings, plays a crucial role in public health emergencies. Many hotels adopt mixed-use and open room spatial layouts, integrating diverse daily functions into a single tiny space, fostering flexible utilization and micro-scale space sharing; however, these also introduce potential health risks. This study offers a comprehensive evaluation of the indoor environmental quality (IEQ) of a hotel room space and discusses feasible intervention strategies for healthier renovation and rehabilitation. Taking a hotel in Shenzhen as a case, a multi-domain environmental assessment was conducted during the COVID-19 quarantine period in the summer of 2022. The study examines the health risks inherent in the hotel’s guest room and the varying patterns of IEQ factors across the hotel’s domains, including volatile organic compound concentrations, physical environmental parameters, and heat stress indices. The results illustrate diverse change trends in the chemical, physical, and heat stress factors present in the tested quarantined hotel room space throughout a typical summer day. Although most of the examined environmental factors meet local and global standards, some problems draw attention. In particular, the PM2.5 concentration was generally observed to be above the World Health Organization (WHO) air quality guideline (AQG) standards, and the interior lighting did not meet required standards most of the time. Moreover, correlation and multiple regression analyses uncover significant influence by physical environmental conditions on the concentrations of chemical pollutants in the hotel room. The study preliminarily identifies that higher relative humidity could lead to a lower concentration of CO₂ while a higher PM2.5 concentration. Wet bulb globe temperature (WBGT) was observed to positively affect CO₂ concentration. Further, the results suggest that even with relatively rigorous initial adjustment and re-renovation, multi-domain environmental quality in air-conditioned quarantine hotel rooms should be monitored and ameliorated from time to time. Overall, this study offers a scientific foundation for healthier upgrades of existing hotel buildings as well as provides insights into achieving environmental resilience in newly constructed hotel buildings for the post-pandemic era.

The Work-Unit Compound (WUC) is a common neighborhood type that became prevalent during China’s socialist era, typically offering communal spaces that serve as vital spatial carriers for communal life. Following the shift in public housing provision from the work-unit (state-owned enterprise) through the social welfare system to a market-oriented system, the decline of work-unit systems and the privatization of housing led to the distribution of responsibility for communal spaces in WUC neighborhoods becoming more intricate. Issues related to these spaces, such as underutilization and poor management, were exacerbated as the built environment deteriorated. By the 2010s, these challenges had become central targets of various participatory regeneration initiatives. However, current discourse on participatory regeneration predominantly focuses on social outcomes, paying limited attention to post-regeneration governance modes. In response, this study develops a framework to examine the continuity and heterogeneity of communal space governance during and after regeneration projects in WUC neighborhoods. It offers a nuanced investigation of context-specific facilitating mechanisms, with the goal of supporting more effective and sustainable communal space governance in the future. Using a case study approach, the research draws on in-depth interviews that were systematically analyzed. The findings indicate that daily communal space governance in the sampled projects continues to rely on internal problem-solving methods inherited from the work-unit system (e.g., the collective sense of honor and a persistent reliance on state actors). Additionally, governance is driven by economic initiatives repurposing underutilized spaces—for instance, vegetable cultivation in enclosed areas is employed for self-sufficiency (Case A), and small-scale business that benefits the neighborhood is performed (Case B). This study also identifies a blend of formal and informal institutional arrangements linked to participatory regeneration, including the coproduction of space management between residents and grassroots government (Case A), and the government-funded purchase of community services (Case B). Moreover, extra-local networks—such as gaining mutual support from Community Garden Networks (Case A) and Community Economic Cooperatives (Case B)—play a significant role. In conclusion, this study highlights the role of facilitating mechanisms associated with participatory regeneration in shaping daily communal space governance and explores the potential of participatory strategies within contemporary neighborhood governance, particularly under recent Chinese policies targeting dilapidated urban neighborhoods. Practically, this study offers recommendations for planners and practitioners regarding incorporating facilitating mechanisms into participatory regeneration to enhance community engagement in communal space governance, especially in other post-socialist cities experiencing similar challenges.