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Carefully analyzing the source of the disease, this is a condition where the deficiency in the Yang aspect is more severe than that in the Yin aspect. When treating Yin deficiency with methods such as Shiquan Dabu Tang (Ten Great Tonifying Decoction) and Rongying Decoction, the emphasis is placed on nourishing Yin while incorporating Yang-tonifying herbs; this originally belongs to a mild and harmonious formula. The primary reason is that the Autumn Equinox is approaching, and dryness Qi is prevailing. One dares not heavily emphasize Yang-tonifying herbs, as using dryness to address dryness would only exacerbate the dryness pathology. However, after the administration of the paste prescription, I had already mentioned that Fuzi (Aconite Lateral Root) and Rougui (Cinnamon Bark) could be used cautiously; this was stated long ago, indicating that it was not a matter of lacking insight. Generally, the Qi of Heaven and Earth changes every half-month, and so does the Qi of the human body. From the eighth month to the ninth month, the Qi has changed twice. The disease trend persists, and appetite decreases further. It is evident that while the Yin aspect receives nourishment from the paste and remains stable, the Yang aspect becomes even more depleted despite the paste's nourishment. Within just one month, there is an imbalance of Yin and Yang, and within one dose of paste, its merits and faults cancel each other out. It is lamentable that correcting imbalances and remedying defects according to seasonal changes leaves one constantly busy.

Regarding the 27th, 28th, and 29th days, when Frost Descent begins and coldness sets in, external Cold invades, and Phlegm-Fluids stir internally. The expectoration of green, yellow, or greenish water indicates involvement of the Yangming Stomach Fu organ. As for the black color, it originates from the depths of the Yangming Stomach, signaling Kidney Deficiency leading to Water Overflow and Spleen Deficiency causing Fluid Accumulation, which has already manifested clearly. Although the patient presents with mental fatigue, a bluish-floating complexion, and a wiry pulse on both sides—consistent with initial Yang insufficiency and internal Phlegm-Fluid accumulation—there is suddenly onset of floating tooth pain, sourness in the mouth and tongue resembling rice washings, hiccuping originating from the Stomach, and rebellious Wei Qi in the hypochondrium. These symptoms manifest as Fire Qi, specifically Liver Fire and Liver Qi. The horizontal rebellion of Qi and Fire stems essentially from Kidney Deficiency failing to nourish Liver Wood, causing Liver Wood to overact upon Spleen Earth. This state of Qi insufficiency constitutes the root of Cold; however, when signs of "excess Qi becoming Fire" appear, it represents a syndrome of "Root Cold and Branch Heat." Given this Root Cold and Branch Heat pattern, is the Yang Qi deficiency indeed deeper than the Yin Qi deficiency? At this stage, discussing the relationship between Kan (Water/Kidney) and Li (Fire/Heart) is indeterminate. Following the principle that "Wind deficiency leads to blazing heat, and Phlegm-Cold leads to obstruction," I proposed using Sanfu Powder (Fuzi-based powder) to assist Spleen Yang, preventing the mutual binding of deficient Wind, Cold, and Phlegm. This not only clarifies the pathological complexity but also aligns with the timing when Earth Qi is dominant. Upon the Start of Winter, one must not administer purely Yang, Yin-depleting substances to a constitution already suffering from chronic Yin-Blood deficiency. Since winter is the season for storage, this formula should be divided into two or three doses, taken once daily. Combined with the previously determined nourishing Yin formula, take five qian in the morning. In the evening, take one and a half qian of Jin Kui Shenqi Wan (Kidney Qi Pill from the Golden Cabinet), delivered with light salt water, to correspond with the generation of Yang at the Winter Solstice, hoping for improvement without heavy medication. As for Heixi Dan (Black Tin Pill) and Kongxian Dan (Controlling Phlegm-Fluids Pill), although they are appropriate formulas tailored to the disease, adaptable to circumstances, and timed appropriately, their use requires the discretion of the two senior physicians.