中国气象局：预计五一假期北方地区多冷空气活动

Group 1 - The core viewpoint of the article indicates that the China Meteorological Administration forecasts significant cold air activity in northern regions during the May Day holiday, leading to noticeable temperature fluctuations [1] - The average temperature in North China and Northeast China is expected to be 1 to 3 degrees Celsius lower than the same period in previous years [1] - Most other regions are projected to have temperatures close to or higher than the historical average, with specific areas in the southeastern Northwest, Jianghan, Jianghuai, and western Huanghuai regions expected to be 3 to 4 degrees Celsius higher than the historical average [1]