Group 1: Urban Renewal and Housing Transformation - The largest non-standard old housing demolition and reconstruction project in Shanghai, the Jing'an District Pengyi Community, has completed its resident relocation, replacing 40 old buildings with 17 new high-rise residential buildings equipped with modern amenities [1] - The trend of urban renewal is accelerating, with many old housing projects undergoing transformation, incorporating smart monitoring technologies, photovoltaic maintenance equipment, and rainwater storage systems to enhance safety, sustainability, and livability [1] Group 2: Smart Monitoring Technology - In Qingdao, the renovation of old communities has integrated smart monitoring technologies, including smoke, water immersion, and health assistance sensors, significantly improving residents' quality of life and safety [2] - Smart monitoring systems act as 24/7 "security guards" for buildings, utilizing sensors to monitor critical parameters like temperature, humidity, and structural integrity, providing real-time data to identify potential safety hazards [2][3] - The technology allows for proactive environmental adjustments, enhancing comfort and safety, such as automatically shutting off gas valves in case of leaks [3] Group 3: Photovoltaic Maintenance - The integration of photovoltaic technology in old buildings is crucial for achieving low-carbon goals, with many buildings now equipped with solar panels to reduce energy consumption [4] - Advanced photovoltaic maintenance systems, including drones, are being employed to inspect and clean solar panels, significantly improving their efficiency and reducing maintenance costs [5] - The collaboration between drones and cleaning robots ensures timely maintenance of solar panels, enhancing their operational efficiency [5] Group 4: Rainwater Management Systems - The construction of rainwater storage and purification systems, such as the one in Beijing's Tongzhou District, exemplifies the implementation of sponge city concepts, effectively managing stormwater and enhancing urban ecology [6] - These systems utilize rainwater for landscape irrigation and beautification, contributing to a more sustainable urban environment [6][7] - The design of rainwater management systems emphasizes the selection of appropriate vegetation to ensure effective water absorption and purification, promoting long-term ecological benefits [7]