Why Chinese Incense Is About More Than Smell

Qi, medicinal materials and the logic behind a traditional Chinese incense formula

If you look at traditional Chinese incense through the lens of modern perfumery, one question appears quickly: why do some formulas contain plants that do not seem especially aromatic? Are they included for scent, or because the maker is considering something else?

To answer that, we first need to ask what xiang 香—usually translated as “incense” or “fragrance”—traditionally meant in China.

“Xiang” Was Broader Than an Aromatic Ingredient

Xu Shen’s Shuowen Jiezi, an early Chinese dictionary, explains 香 with the line:

香，芳也。从黍从甘。
Xiang means fragrant; the character is composed of millet (黍) and sweet (甘).

The entry also cites 黍稷馨香—millet and grain giving off fragrance. The character is not explained through a flower, resin or fragrant wood, but through grain and sweetness. The pleasant aroma of ripened grain belonged to the idea of xiang.

This helps explain why the traditional Chinese material world of incense could include woods, roots, grasses, leaves, fruits, resins and even some substances now encountered mainly through materia medica. For more background, see our introduction to Chinese incense and traditional materia medica.

Incense and Medicine Share Materials, Not Uses

A useful principle in our practice is 香药同源，香药不同用: incense and medicine may draw from the same material world, but they are not used in the same way.

Chinese materia medica contains an enormous number of natural substances. Only a limited selection is appropriate for incense. In the traditional repertoire Xu works with, roughly two hundred materials are considered possible incense materials, but suitability still depends on the specific substance, preparation and intended use.

Gamboge, or tenghuang 藤黄, makes the distinction clear. This resin, associated with Garcinia hanburyi, has a history of medicinal use and is also described as toxic. “Medicinal material” is therefore not a safety certificate for burning. An incense maker must first ask whether a material is suitable for incense use; only then can scent and formulation be considered.

Scent and Qi Are Two Ways of Reading a Formula

Traditional Chinese blended incense can be discussed through both 味 (wei), the scent perceived by the nose, and 气 (qi), the overall direction or character attributed to the formula within the traditional framework.

Scent includes the creamy woodiness of sandalwood, the sharpness of xixin, the aromatic herbal quality of peilan and the character of jiangxiang. Qi is not simply another fragrance note. It is the vocabulary traditionally used to discuss relationships such as warming and cooling, rising and descending, or dispersing and containing.

These are historical formulation concepts, not modern clinical measurements. They help explain why a material with little obvious aroma may still be important to the structure of a formula. The first boundary remains safety; only within that boundary does the maker pursue the beauty of the scent.

Reading a Real Formula: Bi Wen Dan

One incense we make is Bi Wen Dan 避瘟丹, based on the historical formula Bixie Biwen Dan 辟邪避瘟丹 recorded in the Siheting Jifang. The recorded aromatic materials are:

• Jiangxiang 降香 — 4 liang
• Sandalwood 檀香 — 4 liang
• Jianyu 箭羽 — 2 liang
• Danshen 丹参 — 2 liang
• Maozhu / Cangzhu 茅术 — 2 liang
• Lianqiao Xin 连翘心 — 2 liang
• Baizhi 白芷 — 2 liang
• Xixin 细辛 — 2 liang
• Danggui 当归 — 2 liang
• Danpi 丹皮 — 2 liang
• Peilan 佩兰 — 2 liang

The ingredients were dried, ground and formed into large pellets with elm powder as the binder before burning. Read only as a perfume formula, the list can look puzzling. Jiangxiang, sandalwood, cangzhu, baizhi, xixin and peilan have readily recognizable aromas. Danshen, danpi and jianyu are less easily explained as fragrance “notes.”

That is where scent alone becomes an incomplete way to read the formula. The relationship between the ingredients matters as much as the aroma of any one material.

Start With the Proportions

The first thing I notice is the ratio. Jiangxiang and sandalwood each appear at 4 liang, while every other ingredient appears at 2 liang. Before the elm binder is added, these two woods account for about 31% of the aromatic formula. They are not decorative accents; they help form its foundation.

In traditional materia-medica terminology, both are classified as pungent and warm. Several materials beneath that foundation continue the same direction: cangzhu is described as pungent, bitter and warm; baizhi and xixin as pungent and warm; danggui as sweet, pungent and warm; and peilan as pungent and neutral.

Seen together, these materials support an aromatic, warming and dispersing character. In traditional language, the overall direction might be described as leaning toward yang. But the formula is not simply a stack of materials with the same quality.

Why a Warming Formula Also Contains Cooling Materials

Danshen and danpi are traditionally described as slightly cold, lianqiao as slightly cold, and guijianyu—the medicinal material associated with winged euonymus—as cold. If formulation meant adding only ingredients with matching labels, their presence would seem contradictory.

A blended formula can have a main direction while also containing materials that moderate, redirect, support or constrain it. This is why the Jun–Chen–Zuo–Shi, or Chief–Deputy–Assistant–Envoy, framework cannot be reduced to “which ingredient produces which smell?”

Proportion, traditional properties and the relationships among materials all matter. In this framework, the qi of the formula is not the sum of eleven isolated labels; it is the direction that emerges when the materials are put into relationship.

Why Do Some People Describe Bi Wen Dan as “Warming”?

When we ask people about Bi Wen Dan, some describe a subjective sense of warmth arising in the body; others notice only its aroma. We do not treat either response as proof of a medical effect, nor do we claim that everyone should experience the incense in the same way.

Within the traditional vocabulary of the formula, however, the description is understandable. Jiangxiang and sandalwood—the two largest aromatic materials—are traditionally classified as warm, and several supporting materials share that direction. A user who reports “warmth” is describing a personal sensory experience, not a clinical outcome.

This distinction also helps explain the name and historical context discussed in Bi Wen Dan: The Meaning of “Avoid”.

What Are the Less-Aromatic Ingredients Doing?

We can now return to the original question. Some materials announce themselves immediately to the nose. Others are quieter in the aromatic structure but still participate in the relationships that create the whole formula.

A material may influence scent, take part in the traditional qi structure, or do both. This is why “incense and medicine share origins” should not be interpreted to mean that incense is medicine delivered through smoke. The materials may come from the same botanical and materia-medica world, and the maker may use traditional vocabulary such as warm, cool, rising, descending, yin and yang, but the use, preparation and final object are different.

When we read a Chinese blended-incense formula, we are therefore asking two related questions: What does it smell like? And what direction does the complete formula take within its traditional framework? Once those layers are considered together, formulas that initially look strange begin to make more sense.

Sources and Terminology

• Xu Shen, Shuowen Jiezi, entry for 香.
• Siheting Jifang, record of Bixie Biwen Dan 辟邪避瘟丹.
• Ingredient properties in this article use traditional Chinese materia-medica terminology. They describe a historical framework, not medical efficacy from burning incense.

Note: This article discusses traditional incense theory and user-reported sensory experience. It is not medical advice and does not claim that burning incense provides the medicinal effects associated with ingesting or otherwise medically using these herbs.