1. Climate & Natural Phenomena
Bailu (White Dew) is the 15th solar term, occurring around September 7 to 8. It marks the real beginning of cool autumn weather. As daytime sunshine remains warm but nighttime temperatures drop rapidly, atmospheric moisture condenses on leaves, grass, and flower petals into crystal-clear white dewdrops.
Ancient Chinese phenology divided White Dew into three distinctive micro-seasons (Penthads / 三候):
鸿雁来 Wild geese begin their great autumn migration southward in neat V-shaped formations.
玄鸟归 Swallows bid farewell to northern eaves and fly toward warmer southern provinces.
群鸟养羞 Forest birds actively forage and store seeds and nuts to prepare for winter food shortages.
2. Lifestyle, Diet & Customs
An ancient health proverb reminds us: “Once White Dew arrives, do not leave your shoulders and chest exposed (白露秋分夜，一夜凉一夜).” People transition to warmer attire and enjoy seasonal autumn teas.
🍵 Diet & Health
Health regimes during Bailu focus on protecting the respiratory system and strengthening bodily warmth:
- Bailu Tea (白露茶): Autumn-picked tea leaves offer a mellow, sweet fragrance—neither as delicate as spring tea nor as bitter as summer tea.
- Eating Longan (吃龙眼): In Fujian province, people eat fresh longans on Bailu day to nourish the spleen, heart, and blood.
- Sweet Potato & Millet Porridge: Easily digestible root vegetables provide lasting warmth and protect the stomach.
🏮 Folk Traditions
In southern China and the Taihu Lake region, locals celebrate with “Brewing Bailu Rice Wine” (酿白露米酒). Made from glutinous rice, sorghum, and spring water, this mild, sweet wine is brewed to entertain guests and warm the body during cool autumn evenings.
📜 Classic Poetry
No image in Chinese literature is more romantic than the white dewdrops of early autumn, famously captured in the oldest poetry collection, The Book of Songs:
《诗经·蒹葭》 (The Book of Songs - Zhou Dynasty)
蒹葭苍苍，白露为霜。
所谓伊人，在水一方。
(Green reeds stand tall and dense; the white dew turns to morning frost. The beloved one I seek stands somewhere across the misty waters.)
3. Agricultural Wisdom
In rural farming communities, an old proverb states: “White Dew marks the rush; harvest sorghum and pick cotton without delay (白露忙割地，芝麻高粱收紧气).”
This is the busiest autumn harvest window. Farmers work tirelessly to harvest mature crops before autumn frosts threaten the fields, while simultaneously sowing winter grains.