How the Ti and Yong Trigrams Are Determined
When you cast a hexagram using Plum Blossom Numerology (Meihua Yishu), you obtain a base hexagram (ben gua) and a changed hexagram (bian gua). The base hexagram is divided into two parts: the Ti (體, body) trigram and the Yong (用, function) trigram. Which is Ti and which is Yong depends on where the moving line falls — the nuclear trigram containing the moving line becomes the Yong trigram, while the other becomes the Ti trigram.
For example, if the base hexagram is Shan Shui Meng (Mountain over Water, Hexagram 4) and the moving line is in the lower trigram, then the lower trigram Kan (Water) is the Yong trigram and the upper trigram Gen (Mountain) is the Ti trigram. This division is the foundation of all Plum Blossom Numerology readings; every subsequent analysis of generation and control builds on it.
The Ti trigram represents the querent — the person asking the question. The Yong trigram represents the matter or object being asked about. In a promotion reading, the Yong trigram stands for "the position," "the opportunity," or "the decision made by those in power."
What Yong Ke Ti Means
When the Yong trigram controls (ke) the Ti trigram, the direct meaning is: this matter is working against you — an external force is bearing down on you.
In the context of a promotion, Yong Ke Ti generally means that the position you are competing for, or the person holding the decision-making power, is suppressing or obstructing you — or even in open opposition to you. It may mean a competitor has the upper hand, that a superior never intended to consider you in the first place, or that the timing itself is working against your development.
The Five Elements (Wu Xing) control relationships are fixed: Wood controls Earth, Earth controls Water, Water controls Fire, Fire controls Metal, Metal controls Wood. Each of the eight trigrams belongs to one of these elements: Qian and Dui belong to Metal; Zhen and Xun belong to Wood; Kan belongs to Water; Li belongs to Fire; Gen and Kun belong to Earth. When the Yong trigram's element controls the Ti trigram's element, that is Yong Ke Ti.
For example: if the Ti trigram is Kun (Earth) and the Yong trigram is Zhen (Wood), Wood controls Earth — this is Yong Ke Ti. In a promotion reading, this structure suggests the competition is unfavorable to you, or that someone above is quietly undermining you.
Traditionally, Yong Ke Ti suggests the matter is unlikely to succeed, or that even if it barely comes together, you will face considerable hardship along the way. That said, I would not recommend giving up the moment you see this result. You still need to examine what the nuclear and changed hexagrams say — if the changed hexagram shifts to Ti Sheng Yong (Ti generating Yong) or Bi He (same element, mutual resonance), the situation still has room to turn around.
What Ti Ke Yong Means
When the Ti trigram controls the Yong trigram, the meaning is reversed: you are pressing down on this matter, and the initiative is in your hands.
In a promotion reading, Ti Ke Yong is traditionally read as favorable — you have the ability to move things forward. But there is a nuance many people overlook: even though Ti Ke Yong means you are controlling the other side, "control" (ke) inherently carries a sense of expenditure. You are actively driving this forward, and that requires sustained effort — it will not simply fall into your lap.
The Meihua Yishu describes generation and control as follows: Sheng (生) is nourishment; Ke (克) is restraint. Both have an active and a passive side. Ti Ke Yong means you are restraining the other side — you have a sense of mastery, but maintaining that mastery requires continuous exertion.
For comparison, here is how all four generation-control relationships read:
- Ti Sheng Yong: You are investing and contributing, continuously feeding this matter — the matter itself may not return the favor.
- Yong Sheng Ti: An external force is helping you, the opportunity is coming to you on its own, a benefactor is pushing from behind.
- Ti Ke Yong: You are in the driver's seat, there is resistance but you can overcome it.
- Yong Ke Ti: External forces are pressing down on you, the trajectory of events is unfavorable to you.
There is also the case of Bi He (比和) — when the Ti and Yong trigrams share the same or equivalent element. In this case the situation is stable, neither particularly good nor bad, and the competition you face is roughly matched in strength.
A Full Reading Cannot Stop at the Ti-Yong Relationship
Looking only at the Ti and Yong trigram relationship is just the first step. A complete Plum Blossom Numerology reading also requires examining the nuclear hexagram (hu gua) and the changed hexagram (bian gua).
The nuclear hexagram is formed by taking lines two, three, and four of the base hexagram as the lower nuclear trigram, and lines three, four, and five as the upper nuclear trigram. Together they reveal the middle process — what is happening in between. The changed hexagram reflects how the moving line transforms and represents the final direction things are heading.
If the base hexagram shows Ti Ke Yong but the changed hexagram becomes Yong Ke Ti, it means you hold the advantage at the start but end up being outpressed — the final result may not be good. Conversely, if the base hexagram shows Yong Ke Ti but the changed hexagram shifts to Ti Sheng Yong or Bi He, it means there are obstacles now but they can be resolved, and the outcome is not as bleak as it first appears.
If the nuclear hexagram contains trigrams that generate the Ti trigram, there is a benefactor or a turning point in the middle of the process. If the nuclear hexagram controls the Ti trigram, the path through will be grueling.
One more point worth clarifying: Plum Blossom Numerology is highly sensitive to timing. The same question asked at different times can produce entirely different hexagrams. A result of Yong Ke Ti in a promotion reading may not mean "you will never be promoted" — it may simply mean "this particular window is not the right time." Reassessing at a different time is perfectly reasonable. That said, repeatedly casting for the same question is discouraged in traditional practice; the hexagrams will lose coherence.
Before casting, be clear about what you are asking. Are you divining this specific promotion opportunity, or your overall career trajectory? Different questions shift what Ti and Yong are pointing at. This detail is easy to overlook in practice, and it makes a real difference in how you read the result.
Articles in this column are for cultural and educational purposes only and do not constitute life advice.