CiteSpace was used to visualize the knowledge ecology of the green finance research literature in CNKI and WOS, and NVivo software was used to root the code analysis of the current green finance policies in China. From the analysis of the research hotspots, both in China and internationally, great importance is attached to the research on green finance, and the research on green financialization has broad prospects. The core group of authors on green finance research in China has taken shape, whereas the core group of authors of green finance research in the rest of the world has not yet taken shape. There is a lack of close cooperation and a relatively low level of communication among important domestic green finance research institutions, and a certain scale of cooperation network has been formed among influential international institutions. The major countries for influential international green finance research are Singapore, France, Switzerland, Canada and Saudi Arabia, and the international influence of China’s green finance needs to be improved. Both domestic and foreign countries attach great importance to the balance between economic growth and the low-carbon green transition. China attaches more importance to macroeconomic development and strategic transition, but internationally, the trend is toward microcorporate green performance, policy optimization and market innovation. The research focus of green finance has achieved in three stages of evolution, namely, green industry in the early stage, green services in the middle stage and green strategy in the near future. International green finance research focuses on climate change, market players, government performance, social responsibility sharing, etc. In particular, reducing the cost of green development is the focus of international green finance. The domestic focus is on climate risk, carbon neutrality, carbon peak, low-carbon transition, carbon reduction, and green transition themes. Internationally, the focus is on financial performance, decisions, green finance, credit, drivers, quality, socially responsible investment and other topics. Considering the practical implementation of green finance in China, the governance logic of China’s green finance policy consists of five main categories: policy belief, policy objective, policy tool, policy feedback and policy cycle. In the future, the development and improvement of China’s green finance policy should achieve breakthroughs in the following aspects: first, guiding the main body of green finance policy to firmly establish policy beliefs; second, improving the clarity of green finance policy objectives; third, enhancing the overall effectiveness of the governance of green financial policy instruments; fourth, strengthening the green finance incentive policy feedback system construction; and fifth, improving the quality of green finance policy cycles.

In the digital era, digital technology enables political, economic and social fields. However, while the digital divide is pervasive due to the influence of population, geography, the economy and other factors, blindly pushing digital change often leads to the further expansion of the risks of social inequality. This paper constructed a three-dimensional analytical framework of digital gap-bridging policies from the perspective of policy objectives, policy tools and policy effectiveness. Based on this framework, this paper used the content analysis method to conduct a quantitative analysis of 81 digital gap-bridging policies published in China and selected the PMC index model for policy evaluation. The result shows that the policy goal of bridging the digital divide in China mainly focuses on bridging the material access gap and the technology gap, while inadequate attention was paid to the attitude gap and the use gap; in terms of policy tools, there exists an unbalanced situation regarding supply tools, environment and demand tools, with the first one being emphasized more than the others; there is still policy “fatigue” regarding weak feedback and less incentive, though the internal consistency level of the policy is good and the policy structure is reasonable. Therefore, we should optimize policy objectives and policy tools to bridge the digital divide. We should not only consider whether there is “or not” on the equipment and whether there is “or not” on the technology, but also consider whether we want to “or not” on the attitude and feel “or not” on the use; we should not only “give” unilaterally through supply-oriented policies but also “cooperate” with each other through demand-oriented and environment-oriented tools to release the maximum potential of digital empowerment.

Wave energy is a kind of new marine renewable energy with broad development prospects. Many countries have launched aggressive public policies to promote the use of wave-energy technology. In this paper, 729 wave-energy policy documents were visually analyzed by Citespace software, and 31 Chinese wave-energy policy documents were visually analyzed by Nvivo software. It was found that, on the one hand, wave-energy policy research presents an upward trend. Compared with foreign wave-energy policy research, the research foundation of China’s wave-energy policy is weak, the research is not in-depth enough, and the research enthusiasm is not high. On the other hand, China’s wave-energy policy is gradually improving, showing a development trend from extensive to detailed, with diversified policy tools and specific policy objectives, although there is still room for improvement.

The rural digital governance platform is closely related to rural sustainable development. By playing the role of the rural digital governance platform, it can optimize the allocation of rural resources, improve the efficiency of rural governance, promote the development of rural industries, improve the quality of life of rural residents, promote the inheritance and innovation of rural culture, and provide a strong guarantee for the sustainable development of rural areas. Through the continuous advancement of the rural digital governance platform, it is anticipated to achieve the modernization of rural governance, promote industrial prosperity, optimize public services, encourage talent return, and foster cultural inheritance and innovation. This will provide a robust foundation for the implementation of the rural revitalization strategy. Guided by the “digital village” strategy, digital platforms serve as pivotal vehicles for the transformation of rural digital governance. Taking the policymaking process facilitated by the “JuHaoban” platform as a case study, this paper integrates theoretical frameworks with practical applications to construct a “Mixed-Scanning–Multiple-Stream” framework. This framework elucidates the policy innovation process at the local-decision-making level under the influence of the central strategy. The findings indicate that the problem stream can be generated through both proactive scanning and reactive response mechanisms, which can operate concurrently. Decision makers at various levels function as policy entrepreneurs, leading the policymaking community, and the policy window can open either opportunistically or continuously, driven by these decision makers. The policy establishment process of Julu County’s “JuHaoban” platform exemplifies an “up-and-down” dynamic, primarily influenced by political streams. By proactively identifying social issues and responding to emergencies, county-level decision makers implement policy innovations in alignment with the “digital village” strategy. The “Mixed-Scanning–Multiple-Stream” framework provides substantial explanatory power regarding local policy innovation processes within central–local interactions. The conclusions and recommendations offer significant policymaking implications for the development of rural digital governance platforms.

In this paper, CiteSpace and NVivo software were used for the knowledge graph visualization and content analysis of highly cited papers in the research literature on reclaimed water utilization policy in CNKI and WOS. The results showed the following: there was an upward trend in the number of papers on reclaimed water policy, papers in both databases attached great importance to research on this topic, and the research prospects for this topic are broad. The UK, Greece, Italy, the United States, and France have great influence in the field of reclaimed water utilization policy research. The international influence of China’s research on the topic needs to be improved. There is a lack of communication and cooperation among the subjects of reclaimed water utilization policy research, and a cooperative network with close and benign interactions has not yet been formed. The research hotspots of the topic in China are mainly focused on regional governance, with insufficient attention paid to policy and management, while foreign countries pay more attention to policy and management. Behavior guidance policy and black and smelly water will become research hotspots for domestic policies, while public perception, demand, drinking water, and carbon will become research hotspots for international policies. Domestic research on reclaimed water use policy in highly cited papers focused on water environment and ecological security management, while international research focused on the background of reclaimed water use policy and its implementation, with the main intention of optimizing the ascension path and making international research policies thematically stronger. The attitudes of domestic and foreign researchers regarding reclaimed water utilization policies are mainly rational and emotional, indicating that current policies have a degree of applicability. However, there are also obvious problems that will need to be addressed and improved, and there are substantial development prospects. In the future, research on reclaimed water utilization policies in China should strengthen top-level design, improve the policy system, and increase the supervision of policies to achieve optimization.