The Language of Numbers
Last updated 5/21/2026
Plum Blossom arithmetic is simple. The discipline is not in the math. The discipline is in choosing the input honestly and keeping the rule stable.
Most practical versions use two constants:
- Divide by 8 to find a trigram.
- Divide by 6 to find a changing line.
When the division leaves no remainder, use the final position: remainder 0 means 8 for trigrams and 6 for lines.
Trigram Numbers
This course uses the common Early Heaven number order:
| Remainder | Trigram | Image | Phase |
|---|---|---|---|
| 1 | Qian โฐ | Heaven | Metal |
| 2 | Dui โฑ | Lake | Metal |
| 3 | Li โฒ | Fire | Fire |
| 4 | Zhen โณ | Thunder | Wood |
| 5 | Xun โด | Wind | Wood |
| 6 | Kan โต | Water | Water |
| 7 | Gen โถ | Mountain | Earth |
| 0 or 8 | Kun โท | Earth | Earth |
Use this as a conversion table, not as a generic trigram ranking. Do not substitute Later Heaven, palace, or personal mnemonic numbers into these calculations unless a specific lineage lesson tells you to do so. If the number table changes, the method changes.
The trigram number is not a score. It is a conversion key. A count of 13 does not mean โstronger than 5.โ It means 13 divided by 8 leaves 5, so the trigram is Xun.
Five Phase Numbers Are Different
Some Plum Blossom presentations also use Five Phase number correspondences. Keep them separate from trigram remainders.
| Number | Phase |
|---|---|
| 1 | Water |
| 2 | Fire |
| 3 | Wood |
| 4 | Metal |
| 5 | Earth |
These are not a replacement for the Early Heaven trigram table. They belong to a different layer of correspondence. The beginner mistake is to see โ1โ and forget to ask: is this number being used for a trigram, a phase, a branch, a calendar value, or a raw count?
Moving Line Numbers
Lines are counted from the bottom.
| Remainder | Moving line |
|---|---|
| 1 | First line |
| 2 | Second line |
| 3 | Third line |
| 4 | Fourth line |
| 5 | Fifth line |
| 0 or 6 | Sixth line |
The changing line marks the pressure point. It shows where the moment turns, not where the whole answer hides.
The Ninth Point
The eight trigrams describe the patterned field. Some Shao Yong-influenced teaching streams also speak of a center, return, or ninth point: the undivided source from which the eight directions emerge.
Do not put that into the arithmetic. It is a philosophical reminder that the calculation points back to a whole moment, not just to a mechanical remainder.
Sources of Numbers
Good inputs are recordable:
| Input type | Example | Use with care |
|---|---|---|
| Time | 14:27, hour branch, lunar day | Decide whether you are using raw clock numbers or a traditional calendar conversion. |
| Event count | Three knocks, five calls, two people entering | Use the event that actually caught attention. |
| Spatial cue | East-facing door, object above or below | Decide the direction or placement rule before calculating. |
| Tactile count | Rice grains, beads, page number | Count after the action, not before. |
| Sudden number | Receipt total, room number, repeated digit | Use it only when it belongs to the moment. |
Do not keep fishing for a better number. The first honest cue is usually cleaner than the tenth refined one.
The Course Case
The workshop proposal question has two cues:
- Three messages arrive.
- The clock reads 14:27.
One stable rule:
| Step | Calculation | Result |
|---|---|---|
| Upper trigram | 3 divided by 8 | Remainder 3, Li |
| Lower trigram | 14 + 27 = 41; 41 divided by 8 | Remainder 1, Qian |
| Moving line | 3 + 41 = 44; 44 divided by 6 | Remainder 2, line 2 |
Primary hexagram: Li over Qian, Hexagram 14, Great Possession.
Changed hexagram: line 2 changes, producing Li over Li, Hexagram 30, Clarity.
Now the reading has a structure:
- Fire above Heaven: visibility over strength.
- Line 2: the matter turns at the level of practical support, not public display.
- Changed Fire over Fire: the movement increases dependence on clarity, presentation, and correct attachment.
The arithmetic did not interpret the answer by itself. It created the object to interpret.
Quality Control
Before trusting a Plum Blossom calculation, ask:
- Did I record the cue before interpreting?
- Did I choose the conversion rule before seeing the result?
- Can another person reproduce my calculation?
- Did I avoid changing methods midstream?
- Did I use the remainder, not the quotient?
- Can I state the reading in ordinary language?
If the answer to any of these is no, the reading may still be interesting, but it is not clean enough to teach from.
Next, learn how calendar numbers enter the method. Continue to Time and Calendar.