## 5 Discussion
### Theoretical and Practical Significance
For example, the ongoing deepening of the CGSP system in pilot regions like Guangdong Province, the introduction of CGSP systems in Qinghai and Jiangxi Provinces covering residents' daily lives, and the comprehensive CGSP trials in Chengdu, still face challenges such as limited coverage of low-carbon behaviors and low levels of resident participation and engagement [55; 56; 57]. Therefore, designing a digital platform specifically for community CGSP, which focuses on the community level, not only enhances public participation in low-carbon behaviors but also helps build a sustainable closed-loop management mechanism for communities, contributing to the development of a low-carbon economy and ecological civilization. Advantages of Applying Three-Way Decision Models to the Community Carbon Generalized System of Preferences  
Currently, Carbon Generalized System of Preferences platforms around the world are primarily categorized into two models: government-led and corporate-led. However, both models exhibit their respective limitations. Government-led platforms possess authoritative quantification of low-carbon behaviors but offer limited incentives, resulting in low public participation. Corporate-led platforms offer diverse incentives but lack scientific accounting and certification. Furthermore, existing platforms rarely employ scientific decision-making methodologies to enhance residents' participation; they mainly rely on public welfare activities and gift rewards established by corporate-led platforms to motivate residents' participation. Three-Way Decision, as a theory of ternary thinking, is universally applicable across many disciplines and fields, providing an effective strategy for solving complex problems, and has become a research hotspot in various domains [58]. The trichotomous decision model has been widely applied in multiple disciplines, such as medical diagnosis, investment management, social judgment theory, peer review, and management studies [59; 60; 61]. Current research in the humanities and social sciences using trichotomous decision-making is limited, particularly in applying the model to community carbon generalized system of preferences and in studies aimed at stimulating residents' enthusiasm for low-carbon behaviors through scientific decision-making methods [62]. Three-Way Decision aligns with human cognitive patterns and has strong universality and applicability. This study employs the TAO model of Three-Way Decision to construct an operational mechanism for a digital platform for community carbon generalized system of preferences, involving stakeholders such as government departments, communities, power companies, natural gas companies, merchants, and carbon finance institutions. The Trisection mechanism records and quantifies community low-carbon behaviors in four key dimensions: energy conservation and emission reduction, green travel, active advocacy, and digital life. The Action mechanism categorizes residents into three levels of participation--high, medium, and low--based on their engagement, designing targeted incentive mechanisms for each group. The Outcome mechanism evaluates the effectiveness of community carbon reduction efforts using a community carbon generalized system of preferences benefit assessment system and promptly adjusts the incentive mechanisms through scientific decision-making, enhancing the applicability of incentive strategies and specifically boosting community residents' enthusiasm for participating in low-carbon reduction activities. Overall, this study, from an interdisciplinary perspective, applies the TAO model of Three-Way Decisions to the creation of a community Carbon Generalized System of Preferences practice platform, representing significant innovation and providing a new method and perspective for research on carbon generalized system of preferences systems.