Piercing (穿) in Bazi: The Branch Relationship Most English Sources Skip
A newborn lamb, and a four-character verdict
In 《命理珍宝》, 段建业 records someone handing his teacher Hao Jinyang the chart of a newborn lamb, as a test. Hao gave four characters: 穿倒羊刃，一刀之罪 — the goat blade has been pierced and toppled; one knife is the whole sentence. The lamb would not live out the year, and it would die by a blade.
A lamb dying by a knife is not in itself remarkable, and that objection is worth dealing with first, because it is the right one: most lambs end that way. What is remarkable is that Hao did not know he was reading a lamb. He was reading a chart, and the chart said blade.
The sentence also names a mechanism rather than a fate. 羊刃, the goat blade, is the branch carrying the day master at its most extreme; when that branch is 穿倒 — pierced and knocked over — the note reads the outcome as a cutting. I have not been able to recover the four pillars from the OCR text, so take this as a story about a mechanism rather than as a chart you can check.
What is piercing in Bazi?
穿 (chuān), usually written 相穿, is a relationship between two earthly branches, and there are exactly six of them.
子未, 卯辰, 寅巳, 午丑, 申亥, 酉戌.
The same six pairs appear in other lineages under a different name: 六害, the six harms. Same list, different label. The blind-school material uses 穿 and is more specific about what the pair actually does, which is the reason a separate word is worth having.
It is not 冲 (clash). A clash is head-on — 子 against 午, sitting directly across the wheel from each other. A piercing is off-axis: the two branches are not opposites, and the contact is sideways. The image that gets used is a nail going through a wall rather than a battering ram hitting a door.
Most English-language beginner material covers clash, combination and 刑 (punishment) and then stops. Piercing is the fourth relationship and the one that never survives into the short version, which is why people read charts for years without ever checking for it.
Why it ranks with clash and combination, not below
The line in 《命理珍宝》 that settles the ranking is blunt: 六合与六穿、六冲的地位是一样的，不能说合可以穿解冲，只能合穿兼论 — the six combinations, the six piercings and the six clashes sit at the same level. You cannot say a combination dissolves a piercing in order to dissolve a clash. You read them together.
Three consequences follow, and all three are things people get wrong.
One: equal rank means no cancellation. There is a widely taught rule that a combination resolves a clash, and people then try to apply it to a piercing. It does not transfer.
Two: the failure modes are not the same. A clash or a combination opens the container — the storehouse branch opens and you can read what is inside it. A piercing can damage the contents. That asymmetry is why a piercing matters more than its size suggests.
Three: the cases the notes treat as worst are 相克又带穿 — where the piercing also carries a controlling relationship, so the two branches stand in a 克 relation on top of the piercing itself.
The six pairs, and what is actually in each one
Read every pair as two questions: which branch is doing the piercing, and what is sitting inside the branch that receives it.
One: 子未 — 子 water over 未 earth. Earth controls water, so the branch being pressed is the water side.
Two: 卯辰 — 卯 wood over 辰. 辰 is one of the four storehouses, and this is the pair people meet first, because the question is always whether the cupboard was opened or broken into.
Three: 寅巳 — wood and fire, with fire inside both. Some lists also count this pair as a 刑, so the two can stack on the same pair of branches.
Four: 午丑 — 午 fire over 丑, the wet earth storehouse holding 辛 metal and 癸 water. Fire going into a sealed, damp container is the image.
Five: 申亥 — metal and water. 申 pierces 亥, and this is one of the pairs that tends to get read at the level of movement and distance rather than damage.
Six: 酉戌 — metal over 戌, the dry earth storehouse holding 丁 fire. This is the pair that appears in the lawsuit case recorded in the same book, where a clash opens the storehouse and the piercing damages what was hidden inside it.
What all six share: none of them are opposites on the wheel. That is exactly why they get missed by anyone who only ever checks across the circle.
How to find piercings in your own chart
One: write out your four branches — year, month, day, hour — and check every pair against the six. Two of your own branches piercing each other is the natal case, and it is the only one most people ever look for.
Two: write the current 大运 branch and the current year branch beside them, and check those against your four as well. This is the step that gets skipped, and it is the one that matters most — a piercing arriving from a luck pillar or from a year is invisible if you only scan the natal chart.
Three: for each hit, ask which branch is receiving the piercing, and whether that branch is a 喜神 or a 忌神 for you. If you cannot answer the second question, stop there. You have found a structure, not a meaning.
Two recorded readings make that third step concrete. In one chart, 壬寅 庚戌 己丑 庚午 — a woman who became a vice-president at a listed company — the day branch 丑 and the hour branch 午 pierce each other, and the note uses that to explain why she reached the vice chair and not the chair. In another, 壬子 戊申 辛未 丙申 — a man who never married — the year branch 子 pierces the day branch 未, the spouse palace, and the note reads the blockage there rather than in the ten gods. Same mechanism, two very different sentences, and in both cases the meaning came from what was being pierced rather than from the fact of the piercing.
What a piercing does not tell you
Piercing is a structure, not a verdict. A piercing landing on your 忌神 is not automatically bad news for you — it can be the mechanism removing something you did not want.
We have not run 穿 across the 1,285 charts the way we did the ten gods, and that absence is real rather than modest. Treat this the way the 伏吟 page treats repetition: something to test against your own past before you use it on your future.
The test is cheap. Pick one event whose year you already know — a move, an illness, a separation, a change of job — and check whether one of the six pairs was standing there, in the natal chart or arriving from that year. Then do a second one. Two alignments is the minimum before the mechanism has earned anything.
Most people who run this honestly find that piercings are common and that the majority of them marked nothing at all. That is the useful result. It kills the instinct that a piercing must mean something — and that instinct is responsible for more bad readings than the pairs themselves.
Frequently asked questions
What is piercing in Bazi?
穿 (chuān), usually written 相穿, is a relationship between two earthly branches. There are exactly six pairs: 子未, 卯辰, 寅巳, 午丑, 申亥 and 酉戌. Unlike a clash, the two branches are not opposites on the wheel, and the contact is off-axis. It describes a structure rather than a verdict — what it means depends on which branch receives it and whether that branch is favourable to you.
Is piercing the same as the six harms?
The six pairs are the same list that other lineages call 六害, the six harms. What differs is the reading: the blind-school material uses 穿 and is more specific about what the pair does — in particular that a clash or combination opens a storehouse while a piercing can damage what is inside it.
Is a piercing worse than a clash?
No. 《命理珍宝》 puts the six combinations, the six piercings and the six clashes at the same level. They are not worse or better than each other; they fail differently. A clash or combination opens the container, a piercing can damage the contents, and the cases treated as most severe are 相克又带穿, where a controlling relationship rides on top of the piercing.
Does a combination cancel a piercing?
No. The rule that a combination resolves a clash does not transfer. The line in the source is explicit: you cannot say a combination dissolves a piercing in order to dissolve a clash — you read them together, at the same level.
How do I find piercings in my own chart?
Write out your four branches and check every pair against the six: 子未, 卯辰, 寅巳, 午丑, 申亥, 酉戌. Then add the current ten-year luck pillar and the current year branch and check those against your four as well, because a piercing arriving from outside is the one people miss. For each hit, ask which branch receives it and whether that branch is a 喜神 or a 忌神 — without that second answer you have found a structure, not a meaning.