Core Viewpoint - The article discusses the annual winter maintenance of street trees in Shanghai, focusing on the pruning of sycamore trees to reduce issues such as flying fluff and improve the living conditions of nearby residents [3][4][5]. Group 1: Winter Maintenance Process - The winter maintenance, referred to as "winter repair," involves pruning over 1.7 million street trees in Shanghai from late October to April, with sycamores making up 40% of the trees in the area within the outer ring road [3][4]. - The pruning aims to address the increase in sycamore fruit balls, which lead to flying fluff in spring, affecting residents' quality of life [4][5]. - Effective winter maintenance can reduce the production of fruit fluff by 80% to 90% in the following year through strategic pruning of perennial branches [5]. Group 2: Community Engagement - The maintenance teams engage with local residents to gather feedback on tree pruning, providing a "convenience card" with contact information for better communication [8][9]. - The approach to tree pruning is not solely technical but involves social collaboration to address community concerns regarding tree height and density affecting sunlight [9]. Group 3: Nutritional Support for Trees - The article describes a process where workers inject nutrient solutions into the soil around tree roots to enhance their health, which may increase the workload for future pruning but ultimately benefits tree maintenance [10]. - The "winter supplementation" has shown positive results, improving the health of over 24,000 street trees in the Jing'an District, leading to better growth and reduced issues with pests and diseases [10].