今日大寒，共待春归

Group 1: Core Concepts of the "Great Cold" (Dahan) - The term "Great Cold" signifies the peak of coldness in the year, occurring during the coldest period with minimal rainfall [2] - It is a time when nature is dormant, with animals seeking warmth and rivers freezing, reflecting ancient wisdom in weather prediction and agricultural planning [2] Group 2: Customs and Activities during Great Cold - A significant activity during this period is the slaughtering of pigs for the upcoming Spring Festival, symbolizing abundance and preparation for the new year [3] - House cleaning and replacing old decorations are common practices, as families prepare for the New Year by creating a festive atmosphere [5] - Traditional foods such as glutinous rice dishes are consumed, emphasizing warmth and comfort during this cold season [6] Group 3: Natural Phenomena and Observations - The "Three Phenomena of Great Cold" include the ability to incubate chicks, birds being active in hunting, and the thickening of ice in water bodies [10] - Historical practices included ice harvesting for preservation, as well as ice skating competitions during the Qing Dynasty [8] Group 4: Health and Wellness Practices - Recommendations for health during Great Cold focus on clothing to retain warmth, diet to generate heat, and moderate exercise to maintain energy without excessive sweating [12] - Traditional Chinese medicine practices such as Sanjiu plaster and moxibustion are suggested for alleviating cold-related ailments [13]