Group 1 - The core idea of the articles is the shift in Beijing's snow removal strategy, moving away from the use of de-icing agents to more environmentally friendly methods, including small snow removal machinery and manual cleaning [1][2][3] - Beijing has banned the use of de-icing agents in pedestrian paths, parks, and scenic areas, reflecting a change in snow removal philosophy aimed at minimizing environmental impact [1][2] - The city has implemented a precise treatment strategy, allowing for limited use of de-icing agents in critical areas while preserving some snow for aesthetic and ecological benefits [2] Group 2 - Over 86,000 snow removal responsibility segments have been established, engaging government agencies, businesses, and volunteers in snow clearing efforts, showcasing community involvement [3] - A total of 265,000 participants, including sanitation workers and volunteers, have been mobilized for snow removal, highlighting the collective responsibility of citizens [3] - The reduction of de-icing agents is seen as a way to protect the urban ecosystem while ensuring road safety, emphasizing the importance of community support in urban management [3]