Group 1 - The core viewpoint of the articles highlights the impact of a cold wave on agricultural production in China, prompting local authorities to take proactive measures to ensure the safety of crops during winter [1][3][10] Group 2 - In Shandong Province, a blue cold wave warning has been issued, with local agricultural technicians conducting field inspections and providing technical guidance to farmers, particularly focusing on the late sowing of wheat which is 20 days behind the usual schedule [3] - In Tancheng County, 682,000 acres of winter wheat have been planted, and seven agricultural service teams have been established to offer personalized solutions and detailed management to mitigate the cold wave's effects on late-sown wheat [6] - The cold wave is also affecting greenhouse crops, such as blueberries in Wucheng County, where technicians are advising farmers to install smart environmental probes to monitor temperature and humidity, and to implement tailored cold protection strategies [8] - In Hunan Province, a temperature drop of 8°C has been recorded, leading to the mobilization of over 300 agricultural technicians to provide one-on-one guidance to farmers on frost prevention techniques for oilseed rape [10]