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]

Group 1 - Moscow has been experiencing heavy snowfall since January 27, leading to an orange weather alert from the city government, with predictions of continued snowfall throughout the week [1] - The snowfall has reached record levels, with the highest accumulation since 1995, and the snow depth is expected to increase further [1] - Approximately 145,000 people and over 15,000 vehicles participated in snow removal operations in Moscow, with efforts focused on clearing main roads to ensure emergency and municipal vehicles can operate smoothly [3] Group 2 - Since the heavy snowfall began two weeks ago, snow piles have formed in the city center, reaching heights equivalent to two stories, with dump trucks continuously depositing snow [4] - In Moscow Oblast, 30,000 sanitation workers and 7,500 snow-clearing vehicles were deployed, clearing 7,000 kilometers of roads overnight on January 27 [4] - The heavy snowfall has also impacted air traffic, with Sheremetyevo Airport temporarily halting flights for several hours, although other airports in Moscow have not been affected [4]