End of Heat

More About This Solar Term

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 with remarkable precision. The 24 solar terms, originating in the Yellow River basin during the Zhou Dynasty (1046–256 BCE), represent one of humanity's earliest systematic approaches to understanding seasonal change.

In 2016, UNESCO recognized the Twenty-Four Solar Terms as an Intangible Cultural Heritage of Humanity, acknowledging their enduring importance in Chinese cultural identity and agricultural wisdom. Each solar term reflects a specific astronomical event or natural phenomenon — the sun's position at 15° intervals along the ecliptic — dividing the year into 24 equal segments of approximately 15 days each.

Traditional Chinese medicine closely aligns health practices with the solar terms. During each term, specific foods, exercises, and lifestyle adjustments are recommended to maintain harmony with nature. This philosophy, known as "yang sheng" (养生), or the art of nurturing life, remains widely practiced across China today. Seasonal ingredients are chosen not just for flavor but for their perceived medicinal properties — warming foods in winter, cooling foods in summer.

In literature and art, the solar terms have inspired countless poems, paintings, and musical compositions throughout Chinese history. Tang Dynasty poets like Du Fu and Li Bai frequently wove seasonal imagery into their verses, using the specific characteristics of each solar term to evoke mood and meaning. The famous Song Dynasty scroll painting "Along the River During the Qingming Festival" (清明上河图) takes its very name from one of the 24 solar terms — Qingming — capturing the vibrant life of a Chinese city during this spring moment.

Today, the solar terms continue to guide daily life in China. Farmers still consult the traditional calendar for planting and harvesting. Families observe customs passed down through generations — eating spring pancakes at Lichun (Start of Spring), honoring ancestors at Qingming (Clear and Bright), and gathering for family feasts at Dongzhi (Winter Solstice). Schools teach children about the solar terms, ensuring this ancient knowledge system remains alive for future generations. Weather forecasts on Chinese television often reference the current solar term, connecting modern meteorology with traditional wisdom.

Among the twenty-four solar terms, none marks a more welcome transition than Chushu (处暑), the End of Heat. Arriving annually between August 22nd and 24th, this fourteenth solar term signals the moment when the oppressive humidity and scorching temperatures of the summer months finally begin their long retreat. For the farmers, laborers, and city dwellers who have endured weeks of sweltering heat, Chushu arrives as a profound relief — the first cool breeze stirring the leaves, the first evening that invites a light blanket, and the first tangible promise that autumn is truly on its way.

The name itself speaks with remarkable precision: 处 (chǔ) means "to stop" or "to end," while 暑 (shǔ) refers to the summer heat. Together they declare that the reign of heat has concluded. When the sun reaches 150 degrees of celestial longitude, the astronomical mechanism that has governed Chinese agriculture for millennia triggers this seasonal shift. Ancient observers noted that after Chushu, the morning dew grows heavier, the afternoon shadows lengthen, and the once-stifling air begins to carry the crisp, clean scent of autumn. In the philosophy of yin and yang, this moment represents yin energy finally gaining the upper hand after summer's prolonged yang dominance.

The Astronomical and Climatic Turning Point

The ancient Chinese divided each solar term into three pentads, or five-day periods, each marked by specific natural phenomena. For Chushu, the first pentad was characterized by eagles hunting and displaying their captured prey — a behavior ancient observers interpreted as ritual sacrifice to the heavens, reflecting the season's theme of harvest and thanksgiving. During the second pentad, heaven and earth were said to begin their withdrawal, as the vibrant yang energy of summer receded and a more subdued, introspective atmosphere settled over the landscape. By the third pentad, the grain crops were fully ripened, and the entire agricultural world turned its attention to the great harvest.

Meteorologically, Chushu represents a genuine turning point across most of China. In the northern plains, the "autumn tiger" (秋老虎, qiū lǎohǔ) — a brief resurgence of hot weather — may still make occasional appearances, but these episodes grow shorter and milder with each passing day. The nights cool dramatically, and the temperature difference between day and night widens, creating the conditions for heavy morning dew. In the Yangtze River basin, the persistent summer humidity begins to break, replaced by the clear, dry air that Chinese poets have celebrated for millennia. This shift in atmospheric conditions brings not just physical relief but a psychological transformation — the mental fog of summer's heat lifts, and a new clarity of thought and purpose emerges.

Traditional agricultural calendars regarded Chushu as a critical milestone. The summer crops — corn, sorghum, and soybeans — reached their final stages of ripening, and farmers began the intensive preparations for the autumn harvest. In the rice paddies of southern China, the early rice crop was being cut and threshed while late rice seedlings demanded careful attention. The saying "处暑满地黄，家家修廪仓" (chùshǔ mǎn dì huáng, jiā jiā xiū lǐn cāng) — "at Chushu, the fields are golden, and every household repairs its granaries" — captures the urgent anticipation of this season. The year's labor was about to yield its reward, and every able hand was needed for the work ahead.

Releasing River Lanterns: Light Upon the Water

One of the most visually enchanting Chushu customs is the releasing of river lanterns (放河灯, fàng hé dēng). As twilight deepens on summer's last evenings, families and communities gather by rivers, lakes, and canals to set adrift small lanterns — delicate constructions of paper or lotus-shaped vessels bearing candles or oil lamps — onto the dark water. The flickering lights, drifting slowly downstream, create a scene of ethereal beauty that has inspired Chinese poets and painters for generations. Each lantern carries with it prayers for the departed, wishes for the living, and the collective hope that the hardships of summer will flow away with the current.

The tradition of river lanterns during Chushu intertwines with the Zhongyuan Festival (中元节), also known as the Ghost Festival, which often falls near this solar term. According to Chinese folk belief, the gates of the underworld open during the seventh lunar month, allowing spirits to visit the world of the living. The river lanterns serve as beacons, guiding the souls of ancestors and wandering spirits back to their proper realm as the month draws to a close. The act of releasing a lantern onto the water symbolizes both reverence for the dead and the living's acceptance of the natural cycle of departure and return that governs all existence.

In the water towns of Jiangnan — the region south of the Yangtze River famous for its canals and arched bridges — the river lantern tradition reaches its fullest expression. Here, the entire community participates, and the waterways become rivers of light. Some lanterns are simple folded paper boats with a single candle, while others are elaborate lotus-shaped constructions with multiple tiers of petals. Families write the names of deceased relatives on the lanterns, believing the light will reach them in the spirit world. Children are given their own small lanterns to release, learning through this gentle ritual that those who have passed are not forgotten but continue to be honored and loved. The sight of hundreds of lights drifting together on the dark water, their reflections doubled in the still surface, creates an atmosphere of solemn beauty that lingers in memory long after the last lantern has floated out of sight.

The Opening of the Autumn Fishing Season

For China's coastal fishing communities, Chushu marks the official beginning of the autumn fishing season — a moment of enormous economic and cultural significance known as the Opening of the Sea (开渔节, kāi yú jié). After a summer fishing moratorium designed to protect spawning stocks and ensure the sustainability of marine resources, Chushu signals the moment when boats can once again set sail for the rich autumn fishing grounds. The return to the sea is celebrated with ceremonies that blend practical preparation, religious devotion, and communal festivity.

In fishing ports from Zhejiang to Guangdong, the days surrounding Chushu transform into festival occasions. Fishermen prepare their vessels with meticulous care, repairing nets, checking engines, and stocking supplies for weeks at sea. But before any boat departs, the community gathers for rituals of blessing and protection. Offerings of food, incense, and paper money are presented to Mazu (妈祖), the beloved sea goddess who watches over fishermen and sailors. Temple ceremonies invoke her protection for the voyages ahead, and priests chant sutras to ensure safe passage and abundant catches. The sound of firecrackers fills the air, their sharp reports believed to drive away malevolent spirits that might lurk beneath the waves.

The spectacle of the fishing fleet's departure is unforgettable. At dawn on the appointed day, hundreds of vessels — from small family sampans to large trawlers — gather at the harbor mouth, their hulls freshly painted and their bows adorned with red banners bearing auspicious characters. At a signal, the fleet moves as one toward the open sea, the thunder of engines and the blast of boat horns mingling with the cheers of families watching from the shore. The first catch of the autumn season is treated with special reverence; the largest and finest fish are often offered at temples before any are sold at market, acknowledging the sea's generosity and the divine protection that made the harvest possible. This custom, passed down through generations of fishing families, embodies the deep reciprocity between human communities and the natural world that lies at the heart of Chinese coastal culture.

Eating Duck: Cooling the Body for Autumn

Among Chushu's culinary traditions, none is more widespread than the custom of eating duck. Across China, families prepare duck dishes during this solar term, following the belief that duck meat possesses cooling properties that help the body dispel the residual summer heat and prepare for autumn's drier climate. This practice is rooted in traditional Chinese medicine's classification of foods by their thermal nature: duck is considered a "cooling" (凉性, liáng xìng) food, making it the ideal transitional dish as the body adjusts from summer's external heat to autumn's internal dryness.

The preparation of duck during Chushu varies dramatically by region, each cuisine bringing its own techniques and flavors to this seasonal tradition. In Beijing, the famous Peking duck reaches its peak season, the birds having been fattened through the summer on a diet of grains and soybeans that gives the meat its characteristic richness. In Nanjing, saltwater duck (盐水鸭, yánshuǐ yā) — prepared by brining and slow-cooking — is the preferred preparation, its clean, pure flavor reflecting the season's turn toward simplicity. In the spicy kitchens of Sichuan, duck is braised with ginger, star anise, and dried chilies, the heat of the spices paradoxically helping to drive out the body's internal dampness. In Fujian and Guangdong, duck is often stewed with medicinal herbs — Solomon's seal, Chinese yam, and lotus seeds — creating a nourishing soup that simultaneously clears summer heat and strengthens the body for the coming cold.

Beyond duck, Chushu cuisine emphasizes ingredients that moisten and cool. Lotus root (莲藕, lián'ǒu), harvested from the mud of summer ponds, appears in soups and stir-fries, its crisp texture and mild sweetness providing both nourishment and refreshment. White fungus soup (银耳汤, yín'ěr tāng), simmered with rock sugar, goji berries, and red dates, is prized for its ability to moisten the lungs — the organ most vulnerable to autumn's dryness. Pears, honey, and lily bulbs (百合, bǎihé) are recommended by traditional practitioners for their gentle, moisturizing properties. The culinary shift from summer's light, cooling foods to autumn's richer, more nourishing fare happens gradually through Chushu, the kitchen becoming a space where the season's transition is made tangible and delicious.

Health and Lifestyle During the Seasonal Transition

Traditional Chinese medicine pays particular attention to Chushu as a period of heightened vulnerability. The transition from summer to autumn stresses the body's adaptive systems, and without proper care, the lingering heat combined with encroaching dryness can create a condition known as "autumn dryness" (秋燥, qiū zào), characterized by dry throat, chapped lips, cough, and general fatigue. The lungs are considered the organ most sensitive to autumn's influence, and much of the health advice for Chushu focuses on protecting and nourishing the respiratory system.

Sleep patterns shift noticeably during Chushu. The ancient text "The Yellow Emperor's Classic of Internal Medicine" advises going to bed earlier and rising earlier as autumn approaches, aligning the body's rhythms with the shortening days. The recommendation to add an extra hour of sleep during this period reflects the body's need to recover from summer's extended yang expenditure and store energy for the colder months ahead. Afternoon naps, previously discouraged during the humid summer months, become beneficial as the air grows drier and cooler. The bedroom environment is adjusted accordingly — windows are opened to admit the fresh autumn air, and lighter summer bedding is gradually replaced with warmer covers.

Dietary and lifestyle adjustments during Chushu follow the principle of "nourishing yin and moistening dryness" (滋阴润燥, zī yīn rùn zào). Spicy foods, which generate internal heat and can exacerbate dryness, should be reduced in favor of foods with natural sweetness and moisture. Outdoor exercise remains important, but the intensity should be moderated — the vigorous exertion of summer gives way to gentler activities like walking, tai chi, and qigong, which circulate qi without depleting the body's reserves. Emotional cultivation is equally important; Chinese medicine associates autumn with the emotion of grief, and the seasonal transition can stir feelings of melancholy. Practitioners advise cultivating a calm, accepting state of mind, allowing the natural turn toward introspection that autumn brings without falling into sadness. In this way, the wisdom of Chushu extends beyond physical health to encompass the wellbeing of the spirit, reminding us that true health means living in harmony with the seasons of both the earth and the heart.