Major Heat

More Cultural Details

This solar term has been observed in Chinese culture for thousands of years. Ancient Chinese farmers relied on these seasonal markers to plan their agricultural activities. The wisdom of the 24 solar terms was recognized by UNESCO in 2016 as an Intangible Cultural Heritage of Humanity.

During this period, traditional Chinese medicine practitioners recommend specific dietary adjustments and lifestyle changes to maintain harmony with nature. The philosophy of "yang sheng" (养生), or nurturing life, is deeply connected to the solar terms. Each term brings its own recommended foods, exercises, and daily routines.

In literature and poetry, this season has inspired countless works. Poets of the Tang and Song dynasties often used seasonal imagery to express emotions and philosophical reflections. The changing of the seasons remains a central theme in Chinese art and culture.

Modern celebrations of this solar term continue in many communities across China. Local festivals, temple fairs, and family gatherings mark the occasion. Schools often teach children about the significance of each solar term, ensuring that this ancient knowledge is passed down through generations.

Major Heat (大暑, Dàshǔ) arrives as the twelfth solar term and the climatic climax of the Chinese year, typically falling between July 22nd and 24th. As the name declares — 大 (dà) meaning "great" or "major," and 暑 (shǔ) meaning "heat" — this is the hottest period of the entire annual cycle, when the sun's energy, accumulated through months of lengthening days, reaches its absolute peak. The ancient Chinese described this season with visceral intensity: the earth steams, the air shimmers, and even the cicadas' drone seems to thicken in the oppressive heat. Yet amid this thermal extreme, Chinese culture developed a remarkable array of customs, foods, and health practices designed not merely to survive the heat but to harness its unique properties for wellbeing.

When the sun reaches 120 degrees of celestial longitude, Dashu begins, coinciding with the middle and final stages of the Sanfu period — the infamous "dog days" that represent the year's thermal maximum. The ancient text "The Seventy-Two Phenological Signs" records three stages within Dashu: in the first pentad, decaying vegetation spontaneously produces what appears to be fireflies, as the heat accelerates decomposition and the luminescent insects emerge in profusion; in the second pentad, the soil grows increasingly hot and humid, creating the stifling conditions that challenge both crops and humans; in the third pentad, frequent and intense thunderstorms arrive, their dramatic displays of lightning and torrential rain providing brief but violent relief from the accumulated heat. These observations reflect a civilization that paid meticulous attention to the subtle variations within even the most extreme season.

Drinking Fu Tea: Cooling from Within

One of the most widespread and enduring Dashu customs is 饮伏茶 (yǐn fú chá) — drinking "fu tea" during the Sanfu period. This is not a single type of tea but rather a category of herbal infusions specifically formulated to help the body cope with extreme summer heat. The tradition of preparing and sharing fu tea dates back centuries, and in many Chinese communities, it evolved into a form of public charity: tea stalls would be set up along roadsides and at village entrances, offering free cups of cooling herbal tea to travelers, laborers, and anyone seeking relief from the oppressive heat.

The composition of fu tea varies by region, drawing on local herbal traditions and available ingredients. Common components include chrysanthemum flowers for their cooling and vision-clearing properties, honeysuckle for its heat-clearing and detoxifying effects, licorice root for its harmonizing sweetness, and prunella vulgaris (self-heal) for its ability to clear liver fire. In some regions, the tea is sweetened with rock sugar and served at room temperature rather than ice-cold, following the traditional medical principle that extremely cold beverages can shock the digestive system and create internal imbalance. The slightly bitter, floral, and sweet complexity of a well-made fu tea is one of the signature tastes of the Chinese summer.

The communal fu tea tradition embodies important Chinese cultural values. The tea stalls, often sponsored by wealthy families, temples, or community organizations, represented a form of grassroots social welfare — a recognition that the community had a collective responsibility to protect its most vulnerable members from the dangers of extreme heat. The elderly, the poor, and the laborers who had no choice but to work outdoors during the hottest days were the primary beneficiaries. This tradition of shared refreshment created moments of social connection during a season that otherwise drove people into isolated retreat from the heat. In modern China, the tradition continues in adapted form: community organizations and volunteers still set up fu tea stations during the hottest weeks of summer, maintaining a link to centuries of communal care.

Drying Fu Ginger: Preserving Summer's Fire

Paradoxically, one of the most important Dashu customs involves ginger — a warming, pungent spice that seems counterintuitive for the hottest days of the year. The practice of 晒伏姜 (shài fú jiāng), or "drying fu ginger," involves slicing fresh ginger and spreading it in the intense summer sunlight to dry, concentrating its medicinal properties for use throughout the coming year. This custom is based on the traditional Chinese medical principle that the Sanfu period, with its maximum yang energy, is the optimal time to prepare warming medicinals that will be needed during the cold, yin-dominated winter months.

The process of making fu ginger is simple but requires careful attention to the weather. Fresh ginger roots are washed, sliced thinly, and arranged on bamboo trays in direct sunlight. Over the course of several days of intense summer sun, the ginger slices slowly dehydrate, their color deepening from pale yellow to golden brown, their aroma concentrating into a potent, spicy fragrance. Some families enhance the medicinal properties by steaming the ginger before drying, or by soaking it in rice wine before sunning. The finished fu ginger is stored in airtight containers and used throughout the year in cooking and traditional remedies — added to soups to ward off colds, steeped in hot water with brown sugar for menstrual comfort, or chewed raw to stimulate digestion during cold weather.

The practice of drying fu ginger reflects the sophisticated temporal logic of traditional Chinese medicine: the recognition that the body's needs change with the seasons, and that the optimal time to prepare for a future season is when nature provides the appropriate energetic conditions. The yang energy of summer, concentrated in the sun-dried ginger, becomes a stored resource to be drawn upon when winter's yin energy threatens the body's warmth. This principle of seasonal preparation — of looking ahead and preparing now for what will be needed later — extends beyond ginger to include the preparation of various medicinal wines, herbal pastes, and preserved foods during the Dashu period. It represents a philosophy of health as an ongoing relationship with seasonal time, requiring foresight and preparation rather than merely reactive treatment.

Burning Fu Incense and Ritual Observances

In many regions of China, Dashu was traditionally marked by the custom of 烧伏香 (shāo fú xiāng) — burning "fu incense" as an offering to gods and ancestors. This practice combined religious devotion with practical health concerns: the aromatic smoke of the incense was believed to drive away the disease-causing miasmas that were thought to flourish in the hot, humid summer air, while the act of worship sought divine protection against the epidemics that historically accompanied the summer season. Temples would be thick with fragrant smoke during Dashu, and the distinctive scent of sandalwood, mugwort, and other aromatic herbs would permeate entire neighborhoods.

The incense used during Dashu was often specially formulated for the season, incorporating herbs with insect-repelling and antimicrobial properties. Mugwort (艾草, ài cǎo), a staple of traditional Chinese medicine with documented antibacterial and insecticidal effects, was a common ingredient. Calamus, borneol, and other aromatic substances were blended according to traditional recipes passed down through generations of incense makers and temple caretakers. The burning of this incense was not merely symbolic; it served practical functions of air purification and pest control at a time when the hot, humid conditions promoted the growth of mold, the breeding of insects, and the spread of waterborne diseases.

In coastal communities of Zhejiang, Fujian, and Guangdong provinces, Dashu was marked by elaborate 送大暑船 (sòng dàshǔ chuán) ceremonies — "sending off the Major Heat ship." Communities would construct large, ornate model ships from wood and paper, decorate them with offerings of food and incense, and carry them in procession to the shore, where they would be set adrift or burned as offerings to the sea gods. The ceremony served multiple purposes: it ritually "sent away" the heat and the diseases associated with it, it honored the maritime deities who protected fishermen during the dangerous summer typhoon season, and it reinforced community bonds through collective ritual participation. The Major Heat ship ceremony, with its dramatic visual spectacle and deep cultural resonance, remains one of the most distinctive folk traditions associated with the Chinese summer.

Eating Immortal Grass Jelly and Cooling Delicacies

Among the most beloved Dashu foods is 烧仙草 (shāo xiān cǎo), literally "burning immortal grass" but more commonly translated as "grass jelly" — a cooling dessert made from the leaves of the mesona plant, a member of the mint family. The leaves are boiled to extract their gelatinous compounds, and the resulting liquid is cooled until it sets into a dark, translucent jelly with a subtle herbal flavor. Served chilled and often topped with sweetened condensed milk, fresh fruit, or tapioca pearls, grass jelly is the quintessential Dashu refreshment, its cooling properties celebrated in traditional medicine and its refreshing taste enjoyed by generations of Chinese people.

The name "immortal grass" reflects the high regard in which the mesona plant is held in Chinese herbal medicine. It is classified as a cooling herb that clears heat, detoxifies the body, and alleviates summer-related complaints such as heat rash, thirst, and digestive discomfort. Modern research has confirmed that mesona contains compounds with antioxidant and anti-inflammatory properties, providing scientific validation for its traditional use. During Dashu, street vendors and dessert shops across southern China and Taiwan do a brisk business in grass jelly, serving it in endless variations: cubed in sweet syrup, layered in shaved ice desserts, blended into smoothies, or incorporated into bubble tea.

Beyond grass jelly, Dashu cuisine encompasses a wide range of cooling and refreshing foods. Mung bean soup, simmered until the beans release their starch into a soothing liquid, is consumed by the gallon across China. Watermelon, chilled in wells or modern refrigerators, provides hydration and natural sweetness. Bitter melon, stir-fried with eggs or stuffed with minced pork, is eaten specifically for its heat-clearing properties despite its challenging flavor. Lotus seed and lily bulb soup, gently sweetened and served at room temperature, calms the spirit and nourishes the heart. These foods represent the sophisticated culinary response of Chinese civilization to the challenge of extreme heat — a response that combines flavor, nutrition, and medicinal function in every dish.

Agricultural Management and Health Preservation

Despite the oppressive heat, Dashu is a critical period for agricultural management. The proverb "大暑不热，五谷不结" (dàshǔ bù rè, wǔgǔ bù jié) — "if Major Heat is not hot, the five grains will not set" — acknowledges that the intense heat, uncomfortable as it is for humans, is essential for the final maturation of summer crops. Rice paddies require careful water management during this period, as the combination of high temperatures and intense sunlight can rapidly deplete water levels. Farmers rise before dawn to tend their fields, completing the day's essential work before the sun reaches its punishing midday intensity.

Traditional Chinese medicine offers comprehensive health guidance for the Dashu period, focusing particularly on the prevention of 中暑 (zhòngshǔ), or heatstroke — a condition that was recognized as potentially fatal long before modern medicine described its physiological mechanisms. The traditional advice emphasizes moderation in all things: avoid prolonged exposure to direct sunlight, but also avoid excessive reliance on artificial cooling that can shock the body's temperature regulation system; eat cooling foods, but not to the point of creating internal cold; rest during the hottest hours, but maintain gentle activity to prevent stagnation of qi and blood. The concept of 清补 (qīng bǔ), or "clear supplementation," guides dietary choices: nourish the body with light, easily digestible foods rather than heavy, greasy tonics.

The emotional dimension of Dashu health is equally emphasized in traditional medicine. Summer's intense yang energy, associated with the heart and the fire element, can manifest psychologically as irritability, restlessness, and agitation. The traditional prescription is to cultivate mental calmness through meditation, quiet reading, or simply sitting in shaded stillness — practices that acknowledge the mind-body connection and the importance of emotional equilibrium for physical health. This holistic approach to surviving extreme heat — addressing diet, activity, environment, and emotional state as an integrated whole — represents the accumulated wisdom of a civilization that learned to live with, and even to thrive during, the hottest days of the year.