Group 1 - The city management department has implemented a dual-response mechanism of "humanistic care" and "technology empowerment" to ensure the health and safety of sanitation workers while maintaining urban cleanliness during cold weather [1][2] - A series of "Sanitation Homes" have been established in various districts, providing facilities such as accommodation, dining, and emergency services, significantly improving working conditions for sanitation workers [1] - The introduction of smart cleaning robots equipped with autonomous driving technology has enhanced operational efficiency and safety in adverse weather conditions, serving as a valuable supplement to manual cleaning efforts [2] Group 2 - The city management committee utilizes a smart management system to monitor cleaning operations in key areas and tourist spots, ensuring adherence to operational standards during harsh weather [2] - A three-tier supervision mechanism involving self-inspection by enterprises, district-level inspections, and city-level oversight has been established to maintain the effectiveness of sanitation services during extreme weather [2] - The integration of technology and meticulous management practices is crucial for maintaining urban cleanliness and operational resilience in winter [2]