Qi Men Dun Jia (奇門遁甲)

Qi Men Dun Jia (奇門遁甲, "Mysterious Gates Escaping Techniques") is one of the Three Great Arts of Chinese metaphysics alongside Tai Yi and Liu Ren.

Legendary origin. Legend links its origin to the Yellow Emperor Huangdi and its use in ancient military battles.

Military and statecraft history. Historically, the system was employed by Chinese military commanders, strategists, and statesmen to select auspicious dates, directions, and tactics.

Structure — the Square of Nine Palaces

The structure is built on the square of nine palaces (Lo Shu), in which each hour (or day) the following are arranged in a specific order:

8 Doors

Rest, Life, Injury, Obstruction, Fear, Death, Fright, Opening

9 Stars

Each with a character and function

8 Spirits

From the Nine Earths to the White Tiger

10 Heavenly Stems

A multidimensional map of the moment. The intersection of these layers in each palace creates a multidimensional map of the moment.

Application — Tactics, Not Diagnosis

Situational navigation. The application of Qi Men is primarily situational and tactical:

• When to begin negotiations
• In which direction to move
• How to structure an action plan

Distinction from astrology. This distinguishes it from astrological systems that describe natal potential: QMDJ works with a specific situation at a specific moment in time.

Versions of calculation. Both hourly (小時盤) and annual or monthly versions exist.

Place in Errarium

The most navigational of Chinese systems. In Errarium, QMDJ (#38) occupies a unique position: among all Chinese systems on the platform, it is the most explicitly oriented toward tactics and navigation (F4), rather than personality diagnosis.

Functional analog — the I Ching. The closest functional analogue is the I Ching (#6), which also answers the question "what to do now" — though with a fundamentally different structure and degree of formalization.

High complexity. QMDJ is significantly more complex in its calculations and requires specialized training.