味苦。性平。无毒。
【主治】主浸淫疥瘙疽痔。杀三虫。（本经）疗女子阴蚀。（别录）煮汁饮小儿。治蛔虫
有验。
【归经】入胃膀胱二经。为泄热下行之品。
【前论】云岐曰。热淋涩痛不得通利者。湿热郁于下焦也。 蓄煎汤频饮效。
味甘。性寒。无毒。禀土之冲气兼感水之阴气以生。降也。阴也。
【主治】主消渴。客热。止小便数。（别录）胃中热。伤寒内热弥良。（苏恭）解大热。
开胃。
尖。主膈
验。（苏
【归经】入肺脾肾三经。为清热止呕之品。
【前论】丹溪曰。甘益胃。寒降火。故能治疗以上诸症。
【禁忌】经疏曰。因寒霍乱作胀。因寒呕吐。均忌。
味苦辛。性平。无毒。感春夏气化。兼得地中金性以生。可升可降。阳中阴也。款冬
为使。恶天雄、瞿麦、 本、雷丸、远志。畏茵陈。
【主治】主咳逆上气。胸中寒热结气。（本经）疗咳吐脓血。止喘悸。五劳体虚。小儿
惊
痫。
（好
【归经】入肺经。兼入胃经。为清金泄火之品。（紫入血分 辛不燥润不寒补不滞）
【前论】思邈曰。此能治妇人小便卒不得出者。研末。井水服三撮。即通。小便血者。
服五
【禁忌】经疏曰。肺病咳逆喘嗽。皆阴虚肺热也。忌独用多用。即用亦须与二冬、百部、
桑
[Acorus Rhizome / Reed Root - Note: The text contains a mix of descriptions. The first section describes "Xu" (likely referring to *Speranskia tuberculata* or similar diuretic herbs often grouped with reed root in ancient texts, but the header says "Lu Gen" later. However, the description "Mainly treats impetigo, scabies, carbuncles, hemorrhoids... kills three parasites" matches *She Chuang Zi* or *Ku Shen* more than Lu Gen. But looking closely at the structure:
1. First block: "Bitter, Neutral... Mainly treats impetigo... kills parasites... enters Stomach/Bladder". This actually describes **Ku Shen** (Sophora Root) or potentially **She Chuang Zi**. However, the chapter title is "Xu / Lu Gen / Zi Wan". The first paragraph seems to be a misalignment or refers to a herb not explicitly named in the snippet's start, OR it refers to **Xu** (which might be a typo for a specific herb name like *Xu Duan*? No, Xu Duan is different. Let's look at the second block).
2. Second block: "Sweet, Cold... Mainly treats Xiao Ke (Wasting and Thirst)... enters Lung/Spleen/Kidney". This clearly describes **Lu Gen** (Reed Root / *Phragmitis Rhizoma*).
3. Third block: "Bitter/Pungent, Neutral... Mainly treats cough... enters Lung". This clearly describes **Zi Wan** (Aster Root / *Asteris Radix*).
Wait, the first block says "Xu Jian Tang pin yin xiao" (Decoction of Xu drunk frequently is effective). And the header is "Xu / Lu Gen / Zi Wan". It is highly likely the first block is describing **Xu** (possibly *Speranskia* or a local name), but the text provided starts with "Wei Ku" (Taste Bitter).
Actually, looking at standard *Yao Fen Fen Ji*:
The entry for **Lu Gen** usually starts with "Sweet, Cold".
The entry for **Zi Wan** starts with "Bitter, Pungent, Neutral".
The first entry in the prompt is "Bitter, Neutral... treats impetigo... kills parasites... enters Stomach/Bladder". This description matches **Ku Shen** (Sophora Root) or **She Chuang Zi**. However, the chapter title lists "Xu". In some contexts, **Xu** might refer to **Xu Duan**? No.
Let's re-read carefully: "Xu Jian Tang pin yin xiao". This implies the herb is **Xu**.
Is there an herb called **Xu**? Yes, **Xu** (often *Speranskia tuberculata*, Semen Speranskiae) is used for stones/damp-heat. But the symptoms "impetigo, scabies, carbuncles, hemorrhoids, kills parasites" are classic for **Ku Shen** or **Bai Xian Pi**.
However, I must translate what is there. The text labels the section under "Xu / Lu Gen / Zi Wan". The first paragraph does not have a bold header like the others, but follows the pattern. I will translate it as the first item, likely corresponding to the "Xu" mentioned in the chapter title, although the pharmacological description strongly resembles Ku Shen. *Correction*: In *Yao Fen Fen Ji*, the order is often distinct. Let's assume the first block is indeed the herb **Xu** (or a typo in the source for another herb, but I must translate the text provided).
Actually, checking *Yao Fen Fen Ji* content:
Entry 1: **Lu Gen** (Reed Root). Description: Sweet, Cold.
Entry 2: **Zi Wan** (Aster Root). Description: Bitter, Pungent, Neutral.
The text provided has THREE blocks.
Block 1: Bitter, Neutral. Treats impetigo/scabies/carbuncles/hemorrhoids/kills parasites. Enters Stomach/Bladder. Mentions "Xu jian tang".
Block 2: Sweet, Cold. Treats Xiao Ke. Enters Lung/Spleen/Kidney. Header: Lu Gen.
Block 3: Bitter, Pungent, Neutral. Treats Cough. Enters Lung. Header: Zi Wan.
It appears the first block might be **Ku Shen** or **She Chuang Zi** mistakenly placed or part of a previous entry, OR "Xu" refers to **Xu Duan**? No, Xu Duan is Bitter/Acrid, Warm.
Let's look at the phrase "Xu Jian Tang". If "Xu" is the herb name, then the first block is **Xu**.
I will translate strictly based on the text provided.
[Herb 1 - Likely Xu or associated text]
Taste: Bitter. Nature: Neutral. Non-toxic.
【Indications】Primarily treats impetigo, scabies, carbuncles, and hemorrhoids. Kills parasitic worms. (From *Shennong Ben Cao Jing*) Treats erosion of the female genitalia. (From *Ben Cao Jing Jiu Yi*) Boiled into juice and given to children, it effectively treats ascariasis (roundworm infection).
【Meridian Tropism】Enters the Stomach and Bladder meridians. It is a substance that drains heat downward.
【Preceding Discussion】Yun Qi said: For hot strangury (Re Lin) characterized by painful and difficult urination without relief, this is due to damp-heat stagnating in the Lower Jiao. Drinking decoctions of Xu frequently yields good results.
[Lu Gen / Reed Root]
Taste: Sweet. Nature: Cold. Non-toxic. Born from receiving the balanced Qi of Earth and the Yin Qi of Water. It descends. It is Yin.
【Indications】Primarily treats Wasting-Thirst (Xiao Ke), exogenous heat, and stops frequent urination. (From *Ben Cao Jing Jiu Yi*) Treats heat in the Stomach; for internal heat from Cold Damage (Shang Han), it is excellent. (From Su Gong) Clears severe heat. Opens the appetite.
The tip (shoot) primarily treats heat in the chest/diaphragm. Effective. (From Su Gong)
【Meridian Tropism】Enters the Lung, Spleen, and Kidney meridians. It is a substance that clears heat and stops vomiting.
【Preceding Discussion】Zhu Danxi said: Sweet benefits the Stomach, and Cold descends Fire; therefore, it can treat the aforementioned syndromes.
【Contraindications】Miao Xiyong in *Ben Cao Jing Shu* said: Contraindicated in cases of abdominal distension due to cold-induced Huoluan (cholera-like disorder) and vomiting due to cold.
[Zi Wan / Aster Root]
Taste: Bitter and Pungent. Nature: Neutral. Non-toxic. Born from sensing the Qi transformation of Spring and Summer, and additionally acquiring the Metal nature of the Earth. It can ascend and descend. It is Yang within Yin. Used with *Kuan Dong Hua* (Winter Bud) as a guiding herb. Adversely affected by Tian Xiong, Qu Mai, Gao Ben, Lei Wan, and Yuan Zhi. Feared by Yin Chen.
【Indications】Primarily treats cough with rebellious Qi and stagnant Qi causing cold and heat in the chest. (From *Shennong Ben Cao Jing*) Treats coughing up pus and blood. Stops wheezing and palpitations. Treats Five Exhaustions (Wu Lao) and physical deficiency, and pediatric convulsions and epilepsy.
(Good... [Text cuts off])
【Meridian Tropism】Enters the Lung meridian, and also the Stomach meridian. It is a substance that clears Metal (Lung) and drains Fire. (Zi Wan enters the Blood level; its pungency is not drying, its moistening nature is not cold, its tonifying action is not stagnating.)
【Preceding Discussion】Sun Simiao said: This herb can treat women who suddenly cannot urinate. Grind into powder, take three 'cuo' (a handful measure) with well water, and urination will immediately flow. For those with blood in urine, take five... [Text cuts off]
【Contraindications】Miao Xiyong in *Ben Cao Jing Shu* said: Cough, rebellious Qi, wheezing, and coughing caused by Lung disease are all due to Yin deficiency and Lung heat. Avoid using alone or in large doses. If used, it must be combined with Dong Tian (Heavenly Winter/Tian Dong), Dong Bai (White Winter/Bai Bu), Sang Bai Pi (Mulberry Root Bark)... [Text cuts off]