Group 1 - The core point of the article highlights the upcoming winter season in Beijing, with a significant weather change expected on November 7, including precipitation and temperature drop [1] - The weather forecast indicates that precipitation will affect Beijing from morning to night, with rain in urban areas and possible rain mixed with snow in mountainous regions [1] - Residents are advised to dress warmly due to the expected cold weather, which may pose health risks such as respiratory and cardiovascular diseases [1] Group 2 - Several districts in Beijing, including Dongcheng, Chaoyang, Haidian, Changping, and Shunyi, will begin heating system trials on November 7, following customary practices for the heating season [2] - The heating trial, known as "hot state debugging," involves adjusting boiler and pipeline parameters to ensure the heating system operates effectively during the official heating season [2] - Residents are encouraged to monitor their heating systems and report any issues to their heating service providers, as well as assist in system maintenance [2] Group 3 - According to the Beijing Urban Management Committee, the concentrated heating area in urban regions is projected to be approximately 1.07 billion square meters for the 2025-2026 heating season, with residential areas accounting for 701 million square meters and non-residential areas for 369 million square meters [4] - The city has a total of 7,607 heating boilers and 1,152 registered heating service providers [4]