Group 1 - The 2025 World Cities Day Urban Sustainable Development Global Conference was officially opened in Shanghai, where the 2025 version of the "Shanghai Manual: A Guide to Sustainable Urban Development in the 21st Century" was released [3] - The 2025 edition focuses on the theme of "people-centered smart cities" and includes 21 typical cases from 19 cities across 11 countries, with 8 cases from various cities in China [3] - Shanghai's two selected cases include the digital community in Pudong New District and the "smart maintenance" project of the Shanghai Metro [3] Group 2 - The application of metaverse technology in community governance is highlighted, particularly in the East Ming Road Street of Pudong New District, where it engages young people in community participation [5][6] - The metaverse community allows users to access merchant information, public activity schedules, and interact with real-world scenes through AR technology, enhancing youth involvement in community governance [6][7] - The community practice is expanding to 16 other streets and towns in Shanghai, emphasizing local roots, sustainable operations, and collective governance [7] Group 3 - The "smart maintenance" system of the Shanghai Metro utilizes intelligent inspection robots to enhance efficiency and standardization in maintenance operations [9][10] - Shanghai Metro, being one of the largest and most advanced urban rail transit systems globally, is transitioning from passive maintenance to a proactive model using technologies like AI and big data [10][11] - The smart maintenance system aims for real-time monitoring, fault detection, and a significant increase in inspection frequency and efficiency, setting a benchmark for urban rail transit in China and internationally [11]