Six Clashes, Three Penalties, Six Harms & Po in BaZi

The twelve Earthly Branches interact in many ways. Classical texts group the negative relationships into four types:

Most classical and modern schools weight them in this order: Six Clashes > Three Penalties > Six Harms > Destruction. Opinions still differ between schools.

Six Clashes (Liu Chong) are direct oppositions. Each pair consists of two branches that sit opposite each other in direction and share the same yin-yang polarity, so they collide head-on. Their main qi fights (Water against Fire in Zi–Wu, for example, or Earth stirring against Earth of the same kind in Chou–Wei and Chen–Xu). Clashes produce the strongest upheaval. In the Zi–Wu clash, Water and Fire do battle; in the Yin–Shen clash, Metal controls Wood. A clash can break up an unfavourable combination, but it can also break a useful root. Whether the result is good or bad depends on whether the clashed branch is a Useful God (yong shen 用神).

Three Penalties (San Xing) take three forms:

• Yin–Si–Shen, the Ungrateful Penalty (無恩之刑). The hidden stems of these three branches cycle through producing and controlling one another. This symbolises repaying kindness with hostility and fickle, heartless behaviour.
• Chou–Xu–Wei, the Bullying Penalty (恃勢之刑). Three Earth branches of the same kind penalise each other by relying on their combined force. This symbolises the strong oppressing the weak and quarrels in which neither side yields.
• Zi–Mao, the Discourteous Penalty (無禮之刑). In classical terms this means a breakdown of propriety and social order.
• Self-Penalties (Chen–Chen, Wu–Wu, You–You, Hai–Hai). These are generally considered mild and usually show as restless, repetitive agitation.

Six Harms (Liu Hai) arise when a combination is broken by a clash. Zi combines with Chou, and Wei clashes Chou, so Zi and Wei harm each other. Chou combines with Zi, and Wu clashes Zi, so Chou and Wu harm each other. Yin combines with Hai; Si clashes Hai and Shen clashes Yin, so Yin–Si and Shen–Hai are harms. The remaining pairs follow the same logic. The image of harm is covert erosion rather than open confrontation.

Destruction (Po) receives little attention in classical texts. Most modern practitioners treat it as a slight sense of instability. On its own its influence is limited. It only needs serious attention when it appears alongside clashes or penalties.

Take a chart whose four pillar branches are Year Wu, Month Yin, Day Zi, Hour Shen:

• Zi–Wu clash (Day–Year): Water and Fire oppose each other. This affects the self and the early environment.
• Yin–Shen clash (Month–Hour): Wood and Metal oppose each other. This involves the career and health palaces.
• Of the Yin–Si–Shen Three Penalty, Si is absent, so the full penalty is not formed.
• Yin–Wu form a Fire half-combination and Zi–Shen form a Water half-combination. These combinations restrain the force of the clashes. Yin and Shen also both clash and penalise each other, so even without a full Three Penalty, the Month and Hour show clash and penalty together. Both must be assessed.
• These four branches contain no Six Harm and no Destruction.

Key judging points:

1. Closer means stronger. A clash between the adjacent Day and Month pillars weighs more than a distant Year–Hour clash.
2. Is the clashed branch favourable or unfavourable? If the clashed branch is the root of a Heavenly Stem, the people and matters that stem represents are shaken too. If a stem of the same element is revealed to support it, the branch is not easily broken completely, but the sense of movement remains. What matters is whether the clashed branch is favourable or unfavourable, not merely whether it has a root.
3. A branch already in a combination clashes more weakly. If a branch has already combined and transformed with another branch, its clashing force is reduced accordingly.
4. Void branches. A branch in Emptiness (Kong Wang 空亡) is generally weaker, so the immediate effect of clashes and penalties on it is reduced. However, there is also the saying that "clashing the void makes it real": a void branch that meets a clash is activated instead. The outcome depends on whether the branch is favourable or unfavourable and whether a combination lifts it up.

Classical and modern schools differ markedly in how much weight they give to clashes, penalties, harms and destruction:

• Importance of the Three Penalties: Some modern practitioners find that the Three Penalties prove far less reliable in practice than the Six Clashes. They only pay special attention when a penalty falls in particular palaces such as the Day or Month Branch. Certain folk lineages, by contrast, take the health and legal symbolism of the Three Penalties very seriously.
• Independence of the Six Harms: Many experienced practitioners hold that a Six Harm has very little effect on its own unless a Six Clash or Three Penalty acts with it. Its timing is especially hard to pin down.
• Status of Destruction: Some scholars believe Po comes from older date-selection or divination systems. In modern Zi Ping practice it can be treated lightly or even left out.
• Activation by Annual Pillars: Most schools agree that natal clashes and penalties are a constant structural tension. Concrete events usually appear when a Luck Pillar or Annual Pillar triggers them again.

Modern practice tends to treat clashes, penalties, harms and destruction as background structural factors, not fixed verdicts of good or bad fortune:

• Six Clashes: When a Luck Pillar or Annual Pillar touches a Six Clash again, it often corresponds to noticeable change, such as a job change, a move or a turn in a relationship. Whether the change is beneficial depends on whether the clashed branch is a Useful God or an Unfavourable God (ji shen 忌神).
• Three Penalties: These are often linked to recurring friction in one area of life. This is especially true when the penalty involves the Day or Month Branch, where it more readily leaves a mark on relationships or physical health.
• Six Harms and Destruction: These mostly show as a long-term, low-level sense of unease that is hard to tie to a single event, unless the Annual and Luck Pillars trigger them at the same time.

Any judgement of a branch interaction should come back to Day Master strength, the Five Element balance of the whole chart and the choice of Useful God. Never judge clashes or penalties in isolation.

1. "A clash is always bad": Not so. A clash that removes an Unfavourable God or breaks up an unfavourable combination can actually improve the chart's structure.
2. "Clash + penalty + harm + destruction multiplies the bad luck": Incorrect. When several unfavourable interactions occur together, they sometimes restrain one another. Each must be evaluated in turn; you cannot simply add them up.
3. Ignoring the Heavenly Stems: Branch interactions act on the hidden stems inside the branches. If those hidden stems matter little to the chart, the impact of the interaction is naturally limited.
4. "An annual clash on the Day Branch means something bad will happen": Not necessarily. For someone whose chart is stable and whose Useful God is strong, even a year that clashes the Day Branch often brings only minor adjustments to daily life.
5. Mixing up harm and clash: Six Harms and Six Clashes are different mechanisms. Do not call both "clashes" when reading a chart, or misjudgement easily follows.