Fu Shen, the Hidden Line
In a Nutshell
When the Useful Line is absent from a hexagram, a line of the same element lies hidden beneath another line — that hidden line is Fu Shen.
Quick facts
| Item | Detail |
|---|---|
| Branch | Six-Line Divination · the Flying–Hidden (Fei–Fu) system |
| Definition | The line hidden beneath a visible line when the Useful Line does not appear |
| Fei Shen (the Exposed Line) | The visible line pressing above the hidden one |
| When it can work | The hidden line is supported by the day and month, not controlled by the exposed line, and is "drawn out" by a clash |
What is Fu Shen?
Fu Shen belongs to the Flying–Hidden system of Six-Line Divination, a technique from the Jing Fang Na Jia school that fills the gap when a cast hexagram has no Useful Line. After the hexagram is cast and assembled, if none of the six lines represents the matter being asked about, a line of the same element is considered to be hiding underneath one of the visible lines. The hidden one is Fu Shen; the one above it is Fei Shen, the Exposed Line.
Finding it works like this: first fix the Six Relation (Liu Qin) that matches the question, then locate where that relation sits in the head hexagram of the same palace — the palace's head hexagram contains all six relations. Suppose you ask about a new job and take the Wealth line as the Useful Line. The palace head shows Wealth on line 2, but line 2 of your cast hexagram is a Parents line — then Wealth is hiding beneath Parents: Parents is the exposed line, Wealth the hidden one.
Whether the hidden line can actually help follows three traditional tests: it must be strong through support from the day and month stems-branches; the exposed line above it must not control it; and it should be "drawn out" — triggered by a clash or a moving line. If the exposed line controls the hidden one, Fu Shen stays trapped; if the hidden line itself is weak and exhausted, finding it counts for little. These three tests, read together with the whole hexagram, are the working frame of the Flying–Hidden method. Beginners are advised to master the Useful Line and the Six Relations first.
Classical sources
"When the Useful Line is absent from a hexagram, first take the day and month as the Useful Line; if they too hold no Useful Line, seek it in the head hexagram of its palace, whose head hexagram contains all six relations."
Plain words: When a hexagram lacks the Useful Line, a line of the same element hides beneath another line — the hidden one is called Fu Shen, the line above it Fei Shen.
Source: Zeng Shan Bu Yi (Additions and Deletions to the Changes), chapter on the Flying and Hidden Lines
*For entertainment purposes only.*