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Walnut (also known as *Juglans regia*): Taste is slightly sweet, aroma is fragrant, nature is warm. It contains a large amount of oil; after the oil is pressed out, it turns black in a short time. It is an important herb for nourishing the Liver and Kidneys (*Zang-Fu organs*) and strengthening sinews and bones, thus it is effective in treating lower back pain, leg pain, and all types of pain in sinews and bones. Because it tonifies the Kidney, it can strengthen teeth, darken hair, and treat consumptive asthma and cough, Qi failing to return to its root, deficiency-cold of the Lower Jiao (*Lower Burner*), frequent urination, and various conditions such as metrorrhagia and leukorrhea in women. Its nature can also dissolve hardness and resolve blood stasis, treating epigastric and abdominal pain, sand strangury, stone strangury, pain caused by obstruction, and difficulty in urination due to kidney failure in filtering water. If copper objects are accidentally swallowed, consuming many walnuts can also digest them (try chewing with a copper coin; the coin will shatter, indicating its ability to dissolve copper). Furthermore, it is good at eliminating carbuncles and sores, skin scabies and tinea capitis (white baldness on the head), and can treat deep-seated toxic heat in the bone marrow causing weakness and inability to walk.

[Attached Case] A five-year-old child could not walk at age five, had multiple sores on his body that healed but recurred. Knowing his father had long suffered from syphilis, this was determined to be a hereditary venereal disease located deep in the bone marrow. A prescription was given using eight qian of Walnut Kernel per dose, assisted by Honeysuckle Flower (*Lonicerae Japonicae Flos*), White Peeling Bark (*Dictamni Cortex*), Smilax Rhizome (*Smilacis Glabrae Rhizoma*), Fritillaria Bulb (*Fritillariae Cirrhosae Bulbus*), Scrophularia Root (*Scrophulariae Radix*), and Licorice Root (*Glycyrrhizae Radix et Rhizoma*). With slight modifications to this formula, after taking more than twenty doses, all sores healed, and he gradually gained the ability to walk.

Note: Ancient formulas for treating deficiency-cold asthma/cough and soreness/pain in the waist and legs use twenty liang of Walnut Kernel, pounded into a paste, and ten liang of Psoralea Fruit (*Psoraleae Fructus*) steamed in wine and ground into powder. These are mixed with honey until thick like malt syrup, taken with one large spoonful with wine every morning; those who cannot drink alcohol take it mixed with hot water. Wang Ang stated that Psoralea belongs to Fire, enters the Pericardium and Mingmen (*Gate of Life*), tonifies Ministerial Fire to communicate with Sovereign Fire, warms the Dantian, and strengthens Original Yang; Walnut belongs to Wood, communicates with the Mingmen, benefits the Sanjiao (*Triple Burner*), warms the Lung and moistens the intestines, and nourishes Qi and Blood, possessing the wonderful effect of Wood generating Fire. I often use this to treat deficiency-cold of the Lower Jiao, and it indeed has miraculous effects. Adding one jin of Eucommia Bark (*Eucommiae Cortex*) and four liang of Ginger-fried Garlic to the above formula, processed into pills, named Qing'e Wan (*Qing'e Pill*). It treats Kidney deficiency lower back pain, and this formula is not only effective for Kidney deficiency lower back pain but also extremely effective for deficiency-cold leg pain. I once treated a woman over sixty years old who had suffered from leg pain for over a year without cure; her bilateral Chi pulses were deep and fine. She was instructed to take Qing'e Wan daily for over a month and was completely cured. For severe cases of deficiency-cold, three liang of native Sulfur (*Sulfur*) can be added to the formula.