## 4 Discussion
### Relevant Improvements for Urban Greening Strategies  
Our study highlights the need for urban planners and policymakers to consider equity changes when developing green space and urban renewal strategies, as traditional green space indicators cannot effectively monitor these changes. The green visibility equity evaluation framework developed in this research should be integrated into future planning processes to ensure fairness while minimizing undue burdens on low-income communities. Based on the observed changes in visibility equity, we explored the underlying causes of inequities. Building on this, we propose the following improvement measures, considering both human and green space perspectives.  
In the context of Big Data, GVI offers urban decision-makers a new metric to objectively assess the quality of \"people-centered\" urban green space development. However, the high cost and infrequent updates of street view data limit its application in dynamic evaluations [37]. To address this, the government could collaborate with commercial companies to establish a real-time updating dataset, enabling continuous monitoring of green visibility. Additionally, green space equity issues fundamentally involve the interplay between government, people, and capital. As [PERSON] et al. [68] have pointed out: \"True justice is not achieved by focusing solely on distributive equity but is further promoted when people have the right to participate in related decision-making and implementation processes\". To address equity concerns practically, the government should lead green space development by establishing a \"multi-stakeholder cooperation\" framework that includes input mechanisms designed to accommodate the diverse time and resource constraints of residents, particularly those from low-income and migrant groups. Conducting targeted surveys and interviews can help identify community needs without requiring extensive unpaid participation, thus supporting fair benefit distribution strategies.  
Differentiated and fine-tuned regulations can be applied to urban green spaces to meet higher GVI demands. Macroscopically, advancing the open block system and incorporating daily living circles into green corridor planning can be effective [69]. For instance, to address the issue of green space privatization, such as the reduced public accessibility to green resources in the villa district on the southern shore of Moshui Lake, dismantling walls and constructing new greenways to reopen access to the lakeshoe is proposed. This initiative promotes the sharing of green spaces and supports the United Nations Sustainable Development Goals of \"reducing inequalities\" and \"creating sustainable cities and communities\" [70]. Additionally, in densely built areas, selecting street trees with larger leaf areas and canopies, increasing planting density and layers, and reducing hardscapes near buildings can provide extensive shade, mitigate urban heat islands, and address climate change. For example, these tall canopy trees enable reduced air conditioner usage, supporting energy conservation. Grass, maintained with slow-release fertilizers and electric lawn mowers, is preferable to wood chips, paver stones, or wide concrete or asphalt sidewalks.