丁

About

丁 (Dīng) is the 4th of the 10 Heavenly Stems (天干) in BaZi — Yin Fire. Season: Late Summer · Direction: South · TCM organ: Heart / Small Intestine. Combines with 壬 (丁壬合木 — whether it fully transforms depends on chart context). Produces 戊己; controls 庚辛.⁠‌​​‌‌​‌‌‌​​‌​‌‌​‌​​‌​​​‌‌​​‌‌​​​‌‌​​​‌​‌‌‌​​‌‌​‌‌‌​​‌‌‌‌‌‌​​‌‌​‌‌‌​​‌​​‌‌‌​‌​​‌​‌‌​​‌‌‌‌‌‌​​‌​​​‌‌​‌​​‌​‌‌​​‌‌‌​‌‌​​‌​​​⁠

丁 is Yin Fire — the lamp, the candle, the star: a small flame that holds steady through the night. Classical imagery gives it focus rather than blaze — light for what is near at hand, warmth offered quietly and precisely. It is also the flame of the hearth and the forge, associated with refinement and insight. Its combination partner is 壬 (丁壬合木).⁠‌​​‌‌​‌‌‌​​‌​‌‌​‌​​‌​​​‌‌​​‌‌​​​‌‌​​​‌​‌‌‌​​‌‌​‌‌‌​​‌‌‌‌‌‌​​‌‌​‌‌‌​​‌​​‌‌‌​‌​​‌​‌‌​​‌‌‌‌‌‌​​‌​​​‌‌​‌​​‌​‌‌​​‌‌‌​‌‌​​‌​​​⁠

Key Attributes

Element

Fire

Polarity

Yin

Season

Late Summer

Direction

South

Organ (TCM)

Heart / Small Intestine

Combines with

壬 Rén

In a chart, this means…

In a chart, 丁 is traditionally read as focused warmth: attentive, perceptive, persistent — a nature that burns long rather than large, and often notices what others miss. Its classical caution is flicker: sensitivity to the winds around it. The whole chart decides the emphasis.⁠‌​​‌‌​‌‌‌​​‌​‌‌​‌​​‌​​​‌‌​​‌‌​​​‌‌​​​‌​‌‌‌​​‌‌​‌‌‌​​‌‌‌‌‌‌​​‌‌​‌‌‌​​‌​​‌‌‌​‌​​‌​‌‌​​‌‌‌‌‌‌​​‌​​​‌‌​‌​​‌​‌‌​​‌‌‌​‌‌​​‌​​​⁠

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