Three Wonders & Six Instruments: Why Jia Hides

A Qi Men chart distributes the ten Heavenly Stems around the Nine Palaces. Nine of them are visible; Jia is not.

• Three Wonders (Yi, Bing, Ding) — Yi is the Sun Wonder (日奇), Bing the Moon Wonder (月奇), Ding the Star Wonder (星奇). Yi governs softness, connections, negotiation and growth; Bing governs visibility, speed, publicity and the clearing away of what obscures; Ding governs precision, skill, documents, small sharp tools, and quiet persistence.
• Six Instruments (Wu, Ji, Geng, Xin, Ren, Gui) — Wu is capital, solid ground, weight; Ji is ambiguity, concealment, unclear ground; Geng is commonly taken as obstruction, competitors and hard objects, but this is not fixed and must be judged against the use-deity (用神) and the matter asked; Xin is error, past mistakes, damage to reputation; Ren is scale, flow, entanglement, dragging procedures; Gui is latency, soft obscurity, the closing phase.

These are material and tendency, not verdicts. A Wonder falling in a poorly conditioned palace is still good material in a bad environment; an Instrument in a capable palace can get the job done just as well.

Jia is the head of the ten stems; the sixty Jia-Zi cycle begins with Jia Zi, and the six Jia each lead one decade (旬). One common explanation is that a leader should not stand out in the open facing Geng directly, so Jia conceals itself; another holds that Jia is supremely honoured, and the supremely honoured does not show its form, so it entrusts itself to the Six Instruments — this is the dun (遁, hiding) in "Qi Men Dun Jia".

The sixty Jia-Zi divide into six decades, each opened by a Jia, and each borrows one Instrument as its outer garment:

This is the standard list (甲子戊、甲戌己、甲申庚、甲午辛、甲辰壬、甲寅癸); all schools agree and it is not disputed. In practice it means: when you read Wu in a palace, you are also reading the Jia Zi decade leader going under the name of Wu.

NPCC uses the hour-based rotating-plate Qi Men (時家轉盤奇門). Every palace carries two stems:

• the Earth Plate stem, the fixed ground condition of that palace;
• the Heaven Plate stem, which rotates with the hour and sits above it.

They must be read together, top and bottom. The Heaven Plate is the incoming, active factor; the Earth Plate is the existing situation or the place you stand. In the same palace, "Ding over Wu" reads completely differently from "Wu over Ding".

You do not need to plot this by hand — cast an hour chart with NPCC's Qi Men charting tools and read it directly.

Suppose you are weighing when to pitch a proposal, and a palace shows the stem pair "Bing over Wu" (here we discuss only the Heaven and Earth Plate stems; star, door and deity must be checked against the actual chart's ju number and hour, and cannot be assigned out of thin air):

• Heaven Plate stem: Bing (Moon Wonder)
• Earth Plate stem: Wu (capital, solid ground, and also the Jia Zi decade leader under an assumed name)

Layer by layer: the Earth Plate Wu means a thick foundation with resources; Wu can image Jia Zi, but whether it is the decade leader / Zhi Fu of this particular hour depends on which decade the hour falls in. In this example we can only say the ground shows resources and weight — it cannot be judged directly as the principal party. Bing arriving on top adds openness and speed — the matter can be put on the table and moved along quickly. As for the Nine Star, Eight Door and Eight Deity riding that palace, these must be cast from the actual ju and hour and then considered together one by one.

A reasonable read: this stem pair supports facing a well-resourced counterpart in an open, formal way. That is a suggestion about method and timing, not a guarantee of outcome. If the same Bing sat over Geng instead, you would read fast, public movement hitting an obstruction — the same energy, a different result from the same effort.

Beginners most often get stuck on the term Zhi Fu (值符), because three layers of the chart share the name.

In one line: the Eight Deities' Zhi Fu is a deity, the Zhi Fu star is a star, and Zhi Fu / Zhi Shi is a set of selection rules. Different schools emphasise different ones, which is why the term sounds so confusing.

• Rotating plate vs flying plate: NPCC teaches the rotating plate (轉盤), where the Heaven Plate stems turn as a whole group; flying-plate (飛盤) schools lay out the stems by a flying-palace sequence, so the same hour can yield different stem placements. Both have long lineages; they are different systems, not a matter of right and wrong.
• Chai Bu vs Zhi Run (拆補／置閏): two methods of fixing the ju against the solar terms. They give different ju at some boundary hours, so two charting programs may produce different charts for the same moment. Choose one method and stay with it long term.
• The lodging palace (寄宮): the central Palace 5 has no native Eight Door position; the Tian Qin star and the stems of the centre are commonly lodged in Palace 2 Kun (some say Palace 8 Gen, and so on). Lodging rules differ between schools and this is a genuinely disputed point.
• The auspicious weighting of the Three Wonders also varies: some lineages treat a Wonder as auspicious in itself, others require the door and palace qi to match before calling it auspicious.

1. Hunting for Jia on the plate: Jia never appears. If you want Jia, see which Instrument the current decade leader hides under.
2. Equating "Wonder" with "good outcome": Yi, Bing and Ding describe quality of resource. Ding in a weak palace meeting an inauspicious door is still slow, delicate work.
3. Treating all Six Instruments as inauspicious: Wu is one of the most useful stems on the whole plate; whether Geng is an obstruction depends on what you are doing.
4. Ignoring the Heaven/Earth top-bottom order: the stem pair is directional — the upper stem acts on the lower one.
5. Judging from the stems alone: the stems are only one of five layers; palace, stems, star, door and deity must be considered together.
6. Confusing the three Zhi Fu: name the layer out loud as you read — "the Eight Deities' Zhi Fu", "the Zhi Fu star" — and in time you will not mix them up.