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It is Cervi Cornus Colla (Deer Antler Gelatin). *Yaoxing Bencao* (Compendium of Drug Properties) states that Baijiao (White Gelatin) is another name for Huangming Jiao (Yellow Bright Gelatin), which is incorrect. Huangming Jiao is actually Bovis Corneum Colla (Ox Horn Gelatin, made from ox hide).

Also known as Chuanzhi Jiao. The *Shennong Benjing Jing* (Divine Farmer's Materia Medica) describes Ejiao (Donkey-Hide Gelatin), which is made by boiling ox hide. Nowadays, people only value gelatin made from black donkey hide, claiming it treats wind disorders better than other gels. One must use the black variety, taking advantage of the principle that black belongs to Water to control heat generating wind. The reason for valuing A Well water is that it is fed by the Ji River; its quality is clear and heavy, with a nature tending downward, thus treating turbid stasis and rebellious phlegm.
It should be used after being fried in glutinous rice flour until it forms beads. However, authentic Ejiao is hard to obtain. Alternatively, one may draw salty and bitter well water according to the method and prepare it oneself. The methods for making Baijiao are all detailed in *Bencao Gangmu* (Compendium of Materia Medica).

This is Honey (Apis Ceranae Melleum). It grows in deep mountain rocks; those white like paste are superior. Currently, white honey from Henan is used, likely brewed from pear blossoms, which is particularly superior to other origins. *Bencao Gangmu*, in the Fruit section, separately records Shimì (Stone Honey), which is now Rock Sugar (Bing Tang).

Ancient materia medicas did not classify sections. For humans, only hair scales were used. Hai Zang's *Tangye* (Decoctions) incidentally included human urine but did not establish a "Human" section. This is because drugs originate from the human womb/body, emphasizing humanity itself. If usage involves humans and a "Human" section is listed, it is excessively improper. Renbao (Placenta Humanus) was created by Chen Shi's *Shiyi* (Supplement). Although *Bencao Gangmu* included it, it did not endorse it. Citing Cui Xinggong, it only mentions occasional use for treating human deficiency consumption and tuberculosis. Cui Xinggong stated: "Processing for medicinal use causes children to suffer and die prematurely; how can one bear this?" Binhu (Li Shizhen) also mentioned that Wu Xieshan's *Dazao Wan* uses this. However, various drugs are mild tonics; even without Renbao, they can be taken. Now, Guo Shi from Wu Men discusses this prescription, stating that for conditions such as yin deficiency with essence depletion, water failing to control fire, leading to coughing, hemoptysis, bone-steaming tidal fever, and night sweats—belonging to excess yang and deficient yin—taking this consumes the nearly exhausted yin, causing significant harm. Since it is unnecessary when the disease is not severe, and unsuitable when the disease is severe, later compilers could omit this drug and prescription.

*Yaoxing Bencao*: Zhang Yuxi of Song said *Yaoxing Lun* has four volumes, mostly contradicting *Bencao*. The author is unknown. *Bencao Gangmu* says this is *Yaoxing Bencao*, written by Zhen Quan. Zhen Quan lived during Emperor Taizong of Tang, aged 102. The emperor visited him regarding pharmacology, so he presented this book. According to the *Book of Tang: Biography of Zhen Quan*, during the Zhenguan era, Zhen Quan was already over a hundred years old. Taizong visited his residence, observed his diet, consulted on medical arts, and promoted him to Chaosan Dafu. He died soon after at 103. His works, including *Maijing* (Pulse Classic), *Zhenfang* (Acupuncture Prescriptions), and *Mingtang* diagrams, were transmitted at the time. His brother Zhen Liyan was also proficient in medicine. *Yiwenzhi* records Zhen Quan's *Maijing* (1 volume), *Zhenjing Chao* (3 volumes), *Zhenfang* (1 volume), *Mingtang Renxing Tu* (1 volume); Zhen Liyan's *Bencao Yinyi* (7 volumes), *Bencao Yaoxing* (3 volumes), and *Gujin Luyian Fang* (50 volumes). Thus, *Yaoxing* likely belongs to Liyan, but there is an extra volume, suggesting it might not be Liyan's original. *Bencao Gangmu* attributing it to Zhen Quan is unstable; it is better to simply call it *Yaoxing Bencao*.

Volume Sequence: Ancient texts only listed Upper, Middle, and Lower categories without sections. Later compilations varied. *Bencao Gangmu* first lists Water, Fire, Earth, Metals and Stones, then explains Grass, Wood, Bao Wood, Metals and Stones, Human, Beasts, Fish and Insects, Fruits, Vegetables and Grains. The current revision prioritizes Grass and Wood, as they are the root of drugs. Next is Bamboo; according to *Shuowen*, bamboo is named after grass, but it is neither grass nor wood, forming its own category. *Jieyao* follows *Gangmu* calling it Bao Wood, but it is better to call it the Bamboo Section. Next are Fruits, closely related to grass and wood. Next are Metals and Stones, historically prioritized in ancient materia medicas as important drugs. Next are Grains, Vegetables, Poultry, Beasts, Insects, and Fish, which are half daily necessities and also treat diseases. Humans are placed last, following *Gangmu*'s logic from humble to noble. My humble opinion is that since drugs are numerous, if one must take from one's own body, it can be appended as remaining items. For now, I retain the original order, remove Zihéche (Placenta Humanus), add Renzhonghuang (Urea Crust), and list them under "Nearby Residues Appendix," which seems more appropriate.