癸 (Gui, Guǐ, “Yin Water (Six Yi)”) is one of the 9 Stems (三奇六儀) of Qi Men Dun Jia — one of the Six Yi (六儀), the ‘instrument’ stems that conceal the original 甲 leader stem during chart construction. The sixth Yi 癸 — yin water, conceals 甲寅, secrets and dreams; supports occult / divination work.
癸: classical reading and register
癸 (yin water) is one of nine stems used in Qi Men Dun Jia chart construction. The Three Wonders (乙 / 丙 / 丁) are the most-favourable stems and represent classical 'wonder' registers (Sun, Moon, Star); the Six Yi (戊 / 己 / 庚 / 辛 / 壬 / 癸) are the 'instrument' stems that conceal the original Heavenly Stem 甲 during chart casting.
Classical attributes
Category: 六儀 (six yi)
Yi role:癸儀 (隱甲寅) (Sixth Yi (hides 甲寅))
Element: yin water
Tier: neutral
Domain: The sixth Yi instrument; conceals 甲寅; secrets, dreams, occult / divination, hidden information
Positive register
Occult / divination work, dream interpretation, hidden information surfacing usefully, situations requiring access to what is normally inaccessible. The yin water is the most subtle of the Six Yi — favours work in the realm of the hidden and dreamlike.
Negative register
Information that should have stayed hidden being exposed, dreams that disturb without resolving, secrets that turn against the consultant. Inauspicious when concealment is the appropriate strategy.
When to consult 癸
Read carefully — 癸 is the most occult of the Six Yi. Favourable for divination, dream-work, and consultations requiring access to hidden information.
Practical priorities
癸 as one of the Six Yi carries a more neutral register that depends substantially on the surrounding pattern.
Read the stem alongside the gate / star / spirit / palace sharing its location. Stems modulate; the surrounding components determine activation.
The sixth Yi 癸 — yin water, conceals 甲寅, secrets and dreams; supports occult / divination work. It is one of the Six Yi (六儀), the instrument stems that conceal the original 甲 leader stem during chart casting.
What's the difference between the Three Wonders and the Six Yi?
The Three Wonders (三奇: 乙 / 丙 / 丁) are the favourable stems classically associated with Sun / Moon / Star registers — wonders of celestial brilliance. The Six Yi (六儀: 戊 / 己 / 庚 / 辛 / 壬 / 癸) are the instrument stems used during chart casting; they conceal the six 甲 leader stems (甲子 / 甲戌 / 甲申 / 甲午 / 甲辰 / 甲寅) under their respective 戊 / 己 / 庚 / 辛 / 壬 / 癸 covers. The original 甲 is never directly visible in the chart — it operates through its concealing yi.
Should I look for 癸 specifically in my consultation?
Read carefully — 癸 is the most occult of the Six Yi. Favourable for divination, dream-work, and consultations requiring access to hidden information.
QI MEN DUN JIA FORECASTING
Get a chart-aware QMDJ reading for your specific question.
Master Sean Chan’s Qi Men Dun Jia forecasting consultation reads the specific question you bring against the current dun period’s chart. The reading identifies which gates / stars / spirits are activating for your question, what classical patterns are present, and the favourable timing window for your action. Zero generic advice — every consultation is chart-specific.
Master Sean Chan’s free Qi Men Dun Jia calculator plots the current chart for any time of day. Use it to see the current dun period’s gate / star / spirit / stem distribution across the nine palaces — useful for self-study, but no substitute for chart-aware reading of a specific question.
Master Sean Chan’s QMDJ Bootcamp takes you from beginner through intermediate — chart casting from date and time, the dun-period mechanism, the heaven/earth board rotation, and how to read the 9 stars / 8 gates / 8 spirits / 9 palaces / 9 stems for actual consultation questions. The bootcamp teaches the methodology these reference pages deliberately omit, so you can read charts for yourself.