The aftercare in the third and ninth seasons is still based on "tonifying yang and dispelling cold", and it is necessary to protect the yang from winter to the future. Huangdi Neijing said: "In winter and March, this is called Guan Zang." In other words, all ventilators should be turned off and stored. As the saying goes, it is the most important season in health care, and ancient health care practices attach great importance to this period, mainly because "the solstice in winter is sunny." According to the gossip theory, it symbolizes the birth of Yang. People think that when Yang is born, it should be carefully protected and nursed, just like farmers' seedling raising and women's pregnancy, so that it can grow sturdily. The human body is full of yang, which can achieve the purpose of eliminating diseases and prolonging life. At this time, nursed back to health is to strengthen the role of this newborn Yang in the body, so that it can grow slowly and be used by the body.