| Around mid-July, something shifts in China. The sun hangs lower and brighter, the air turns thick and heavy, and every conversation starts with a sigh about the heat. This is the arrival of 三伏天 (sānfútiān) — the three fu days — widely known as the hottest, most humid period of the Chinese year. Stretching for roughly 40 days from mid-July to mid-August, sanfu is more than just weather — it is a seasonal event with its own traditions, health rules and food culture that have been passed down for over 2,000 years.  The word 伏 (fú) literally means “to crouch” or “to hide,” and the name carries a clear message: this is the time to lie low, stay out of the midday sun, and let the heat pass. The period is divided into three stages: 初伏 (chūfú) — the first fu, about 10 days, 中伏 (zhōngfú) — the middle fu, the longest and hottest part at 20 days, and 末伏 (mòfú) — the final fu, another 10 days. Unlike fixed solar terms, the exact dates of sanfu shift slightly each year, calculated according to the traditional Chinese calendar. What makes sanfu special is the traditional health philosophy around it. The most famous principle is 冬病夏治 (dōng bìng xià zhì) — “treat winter illnesses in summer.” The idea is that during the hottest days, the body’s pores are open and energy is at its peak, making it the perfect time to treat conditions that flare up in cold weather, such as asthma, arthritis, chronic coughs and poor circulation. The most visible tradition is 三伏贴 (sānfú tiē) — herbal medicinal patches. Hospitals and clinics across the country apply warm, herb-infused adhesive patches to specific points on patients’ backs and necks on the first day of each fu period. Millions of people do this every year, especially children and the elderly, believing it strengthens the immune system for the coming winter. Food is another central part of sanfu culture. There is an old saying: “头伏饺子二伏面，三伏烙饼摊鸡蛋” — “dumplings for first fu, noodles for second fu, pancakes and eggs for third fu.” Carb-heavy, easy-to-digest meals are preferred when the heat kills people’s appetites. Other popular summer foods include 绿豆汤 (lǜdòutāng) — mung bean soup, 冬瓜汤 (dōngguā tāng) — winter melon soup, and plenty of fresh lotus root and bitter melon, all believed to clear internal heat. Modern life has added its own survival strategies. Office workers rely almost entirely on 空调 (kōngtiáo) — air conditioning — and many cities issue high-temperature warnings when the heat reaches dangerous levels. Outdoor workers get extra pay and shorter shifts. Street life moves entirely after dark, with night markets and evening walks replacing daytime activities. One piece of traditional advice still holds true for everyone: slow down. Sanfu is not a time for big plans, hard exercise or rushing around. It is a time for light meals, afternoon naps, and staying cool until the heat finally breaks. |
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