Group 1 - The current cold wave is primarily characterized by temperature drops and snowfall in northern regions, which benefits wheat by providing insulation and maintaining soil moisture for winter growth [2] - Snow cover acts as a protective layer for wheat, reducing soil temperature decline compared to air temperature, and helps protect root growth points from frost damage [2] - In years with frost damage, conditions often include both drought and low temperatures, leading to soil cracks that increase moisture evaporation and exacerbate cold temperatures [4] Group 2 - In southern regions, freezing rain is expected, which may affect winter rapeseed leaves; farmers are advised to implement proper management practices and drain excess water after rainfall [5] - Some farmers are already using drones to spray anti-frost agents as a preventive measure, suggesting a potential for technology adoption in frost protection [7] - For simple greenhouses, wet snow poses a risk of collapse and damage; farmers are recommended to reinforce structures and remove snow promptly [9]