Group 1: Urban Renewal and Historical Building Protection - The article discusses the integration of urban renewal with the protection of historical buildings, emphasizing the need to excavate valuable urban space while improving the functionality of old structures [2][5] - Innovative technologies, such as the "step-by-step walking" displacement technology, have been developed to safely relocate historical buildings without damage, allowing for urban development and preservation to coexist [5][6] - The successful relocation of the 90-year-old Huayanli building in Shanghai demonstrates the effectiveness of these technologies, which enhance safety, efficiency, and reduce costs compared to traditional methods [5][6] Group 2: Technological Applications in Historical Preservation - The use of 3D scanning and drone photography in the preservation of the Barkhor Ancient City in Lhasa exemplifies how technology can provide precise data for the restoration of ancient buildings while maintaining their traditional appearance [7][9] - The integration of modern amenities, such as cafes and bookstores, into the ancient city reflects a balance between preserving cultural heritage and enhancing the living environment for residents and visitors [9] Group 3: Urban Safety and Infrastructure - The article highlights the implementation of safety measures in urban infrastructure, such as the installation of gas leak alarms in commercial establishments, which automatically shut off gas valves and alert owners in case of leaks [10][11] - The establishment of a comprehensive monitoring network for urban infrastructure safety in Hefei aims to address safety risks associated with rapid urban development and population growth [11] - The Hefei Public Safety Research Institute is focused on enhancing urban resilience through advanced monitoring and early warning systems, utilizing new technologies like artificial intelligence [11]