11月下半月中国空气质量整体以优良至轻度污染为主

Group 1 - The overall air quality in China during the second half of November is expected to be primarily good to lightly polluted, influenced by multiple cold air masses [1][2] - In specific regions such as North China, Central South China, and Northeast China, moderate or above pollution levels may occur due to local conditions [1] - The Beijing-Tianjin-Hebei region is forecasted to have good to lightly polluted air quality, with beneficial dispersion conditions during cold air intervals [1] Group 2 - The Fenwei Plain region is expected to have predominantly good air quality, with potential for light pollution during cold air intervals [2] - The Northwest region is also predicted to maintain good air quality, although light pollution may arise due to dust storms between November 22 and 24 [2]