Group 1 - The core viewpoint of the article highlights the expected impact of four cold air processes in February, which may affect transportation and other sectors during the Spring Festival period [1] - The first cold air process is expected from February 5 to 7, followed by another from February 10 to 13, with a potential cold air impact before the Spring Festival holiday [1] - The intensity of the cold air processes varies, with moderate strength in early February, stronger in mid-February, and weaker towards the end of the month [1] Group 2 - Northern regions are advised to prepare for significant temperature drops and heavy snowfall, particularly in areas like Inner Mongolia, Northeast China, and Northern Xinjiang, where temperatures may be below normal [2] - Areas in Northeast and Central China should be aware of low-temperature rain and snow risks, necessitating safety measures for transportation and energy supply [2] - Regions in Southeast China and parts of Southwest China are at risk of meteorological drought, requiring water conservation efforts and fire prevention measures [2] - The Northwest region is expected to experience increased dust and low visibility, which could adversely affect health and transportation [2] Group 3 - January saw higher-than-normal temperatures in China, with significant fluctuations and below-average precipitation [3] - A total of five cold air processes impacted the country in January, which is above the normal frequency for this time of year [3] - Drought conditions have developed in several regions, including severe drought in parts of Fujian and Guangdong [3]