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Linderae Radix (Wuyao), pungent in taste, warm in nature, belonging to Yang, non-toxic. It enters the Foot-Shaoyin Kidney Meridian and the Yangming Stomach Fu-organ. Its nature is predominantly dispersing and draining, not overly rigid or strong, capable of eliminating various cold pathogens. For conditions where Qi stagnation causes regurgitation (Fanwei/Ge Shi), it promotes smooth flow; it resolves distension caused by food accumulation, reduces urination, expels Qi rushing that causes pain, wards off epidemic miasma and seasonal pathogens, resolves gu poison and sudden stroke attacks, attacks stagnant and congealed Qi and Blood in women, and eliminates accumulations and roundworms in children. This herb has many claimed functions but few actual effects, likely serving as a minor assistant or guide herb. Because its strength is weak, one might think it can be used in large doses; however, excessive use often yields poor results. It is better to use small amounts to assist the sovereign and minister herbs.

Linderae Radix (Wuyao) is of little critical importance; in reality, using too much yields little benefit, a fact unknown to contemporary practitioners. For postpartum women who are deficient and have irregular fetal Qi, it must absolutely not be used, as doing so will cause immediate miscarriage. People assume it is used to regulate Qi, but who knows that Linderae Radix (Wuyao) can regulate the excess type of fetal Qi but cannot regulate the deficiency type? Not only for fetal Qi, but for any condition involving Qi deficiency, it cannot be used to regulate Qi. It is suitable only for cases where there is Qi and Blood deficiency accompanied by stagnation.

Dragon's Blood (Xuejie), pungent and salty in taste, neutral in nature, slightly toxic. Enters the Kidney. Treats traumatic injuries from falls and blows, eliminates malignant carbuncles and ulcers, specifically breaks up accumulated blood, draws out pus, drives away pathogenic Qi to relieve pain, and is frequently used in surgery. However, for treating various pains, it is truly miraculous when used internally. It is recorded here for future reference.

Although Dragon's Blood (Xuejie) can be used in internal medicine, contemporary practitioners dare not use it. They do not know that when combined with herbs that tonify Qi and Blood, its efficacy becomes even more miraculous. Alas, people are unaware of this, hence I clarify it again.

Agarwood (Chenxiang), pungent in taste, slightly warm in nature, belonging to Yang, non-toxic. Enters the Mingmen (Gate of Life). Tonifies Minister Fire, suppresses Yin while assisting Yang, nourishes various Qi mechanisms, penetrates heaven and earth, treats vomiting and diarrhea, guides "Dragon and Thunder Fire" downward to hide in the Kidney Palace, calms rebellious Qi causing vomiting, connects upward to the Heart, making it an excellent product for the interaction between Heart and Kidney. Furthermore, it is warming without being hot, allowing for long-term use to benefit Yang.

Agarwood (Chenxiang) warms the Kidney and unblocks the Heart. Using Coptidis Rhizoma (Huanglian) and Cinnamon Twig (Rougui) to facilitate the communication between Heart and Kidney is less convenient than using Agarwood (Chenxiang), which achieves two purposes with one herb. However, when using Agarwood (Chenxiang) to facilitate Heart-Kidney communication, the optimal dose is one qian. There is no need to grind it with water; slicing it into pieces, grinding into powder, and mixing it into Heart-Kidney tonifying decoctions for simultaneous consumption is acceptable.