Do BaZi Schools Cast the Same Chart? Compared to Guqin

Wild Geese Descending on the Sandbank is one of the most widely played pieces in the guqin repertoire. The Guangling school plays it with dense vibrato, frequent breaths, and a tempo that follows the mood. The Meian school plays it with a clear beat, tighter pacing, little left-hand sliding, and an added passage that imitates the calls of geese. The Jiuyi school, through Guan Pinghu, sounds different again: firm fingerwork, wide autumn colour, lively birds.

Look one level closer. Zhang Ziqian and Liu Shaochun both belonged to the Guangling school. In the seventh section the old score marks a slide up to the seventh hui and seven tenths. Zhang notated it to seven-six; Liu actually played to seven. That is a whole major second apart.

None of them played it wrong. The guqin score records finger positions, not durations — so the same score necessarily grows into different performances.

Guqin uses tablature. It tells you which hand, which string, which position on the instrument, which finger technique — but it does not write durations. How long a note is held, where a phrase breathes, whether a section runs fast or slow: the score is silent on all of it. This is why guqin has an activity other traditions do not: da pu, turning an old tablature into a playable piece. Guan Pinghu, Wu Jinglue and Yao Bingyan each worked from the same sources and produced three different results, and all three became modern classics.

The consequence is a working rule among players: positions can be checked, phrasing cannot. The first you verify against the score. The second you can only prefer.

BaZi has exactly the same structure, though it is rarely laid out this way. The score is the four pillars — eight characters, plus the solar term that sets the month and the birth hour. The performance is how those eight characters get read: strength or weakness, structure, imagery, which character is doing the work.

Start with the practical question: do different schools produce the same chart?

Broadly, yes. The four pillars are not anyone’s proprietary algorithm. They are a calendar: the year pillar turns at the start of spring, the month pillar follows the solar terms, the day pillar is a continuous count of sixty, and the hour stem is derived from the day stem. Those four rules are shared. Feed in the same moment and the eight characters usually come out identical.

But usually is not always. There are three places where schools genuinely produce different pillars. Without settling them, every later discussion about interpretation rests on sand.

One: whether true solar time is applied

Mainland China runs on the clock time of 120 degrees east, but a chart is computed from the astronomical time of the birthplace. Every degree of longitude is four minutes. Urumqi sits near 87.6 degrees east — 32.4 degrees from the standard meridian, about 130 minutes. A recorded clock time of 23:30 there converts to roughly 21:20, which falls in the previous two-hour period, not in the rat hour at all.

That changes the hour pillar entirely. Serious practice, in the line of Liang Xiangrun and Zhong Yiming, insists on the conversion; folk practice often uses clock time directly. The two are not more or less mystical — they are not starting from the same moment.

Two: does 23:00 to midnight belong to today or tomorrow

The rat hour spans 23:00 to 01:00. Where the day pillar sits for the 23:00 to 24:00 segment is the oldest open question in the field:

• Traditional school: the day changes at 23:00, and the day pillar moves with it.
• Revised school: 23:00 to 24:00 still belongs to the current day; the change happens at midnight.
• Blind schools: usually no subdivision — anything past midnight counts as the next day, which is simpler to apply in the field.

Move the day pillar and the ten gods, the direction of the luck pillars, and every downstream judgement move with it. This is not a rounding difference. It is a different chart.

Three: how precisely the solar term is timed

The year turns at the start of spring and the month turns at each of the twelve seasonal nodes. Whether the node fell before or after the birth minute decides both pillars. Tools that only compare dates will misplace anyone born on a transition day.

Outside these three, the pillars do not diverge. So the claim that every school produces a different chart is overstated — most of the time it is one chart, and the argument happens later.

If there is a disagreement, hiding it is the worst option. Baize writes each switch out, so you know which conventions produced the chart you are looking at.

• True solar time: on by default. The correction includes not only the longitude offset but the equation of time, so it can differ by minutes from a naive longitude adjustment. Births outside China are first converted from local civil time.
• Daylight saving: selectable. China observed daylight saving from 1986 to 1991, so anyone born in those summers using the clock time on the certificate is an hour out.
• Late rat hour: defaults to the traditional rule — after 23:00 the day pillar counts as the next day. It can be switched to keep the current day. The default is stated, not buried.
• Solar terms and the start of spring: evaluated to the minute, not to the date.

Together these make the chart reproducible: anyone applying the same input and the same conventions gets the same eight characters. A reading that cannot survive that test is not worth arguing about.

Suppose the chart is identical. The divergence now happens in how it gets read, and there are three common routes.

The classical route starts from the month command: what season the day master was born into, what structure that relationship establishes, then strength and support. Its question is whether the structure can carry wealth and authority.

Blind schools take a different path. They weight the clashes, combinations and punishments among the branches, look at which character is doing work, and ask whether wealth and authority are actually held. The same chart can read as too weak to carry wealth on one route and as a chart that should abandon the day master and follow wealth on the other. Opposite conclusions — but they are answering different questions.

New-school approaches compress the process toward the extremes, favouring decisive readings of charts that classical practice would place in the middle.

The difference between the three is not what they can see. It is which column they decide to read first. That is a choice of method, not a question of right and wrong.

The guqin case is useful here because it draws the line cleanly.

Checkable: the position. Zhang played to seven-six, Liu to seven. Open the score and you can say who departed from it and by how much. That difference has a factual answer.

Not checkable: how deep the vibrato goes, how long a breath lasts, how fast the section moves. The Guangling retreating vibrato and the Meian goose calls are both defensible, both admired, and there is no way to rule one correct.

BaZi maps onto this exactly. The four pillars are the checkable layer: was the hour converted, did the solar term turn before or after, how was the late rat hour handled. Those have one answer. Strength, structure and imagery are the uncheckable layer: you can ask whether a method is internally consistent on this chart, not which school is right.

So the first move in evaluating any reading is not to judge how smoothly it is told. It is to ask: is this a position-level difference or a phrasing-level difference? Presenting a choice of method as a disagreement about the chart is passing an aesthetic preference off as a fact.

When two readings conflict, these three questions will usually locate the fault:

1. Was true solar time applied? Where was the birthplace, what longitude, what does the conversion give. This alone resolves a large share of apparent disagreements.
2. How was 23:00 to midnight handled? Day pillar as today or as tomorrow. If one reading uses the traditional rule and the other the revised one, the charts part company at the day pillar.
3. Which method selected the useful element? Support and restraint, seasonal adjustment, bridging, or imagery. Different methods yield opposite preferences from the same chart, predictably.

After those three, it is usually clear whether the chart itself differed (an input problem) or the reading did (a method problem). The two call for completely different responses: check the birth data, or stop arguing and find out which method you are looking at.

This is the same territory covered in our piece on why two practitioners read one chart differently, which lists the four points of divergence item by item.

Guqin schools still coexist and nobody is trying to standardise them into one correct version. The reason is structural: tablature does not record rhythm, so a single correct performance cannot exist. Schools are not a defect. They are what that notation system necessarily produces.

BaZi behaves the same way. The four pillars record structure, not how to read it. The argument over method will therefore never conclude, because it was never a question with one answer.

One thing can and should be standardised, though: the chart. Whether the hour is converted, where the day turns, how precisely the solar term is timed — these are factual, not aesthetic. Settle the facts and what remains is a disagreement worth having.

Do blind-school and classical practitioners produce the same chart?

Usually yes. Both use the same sexagenary calendar rules; given the same moment and the same conventions on solar time and the late rat hour, the eight characters match. The divergence is in reading, not in casting.

If two charts differ, is one of the tools wrong?

Not necessarily. Check three things first: whether true solar time was applied, how 23:00 to midnight was handled, and whether the solar term was timed to the minute. Differ on any of those and the pillars differ, with neither side having miscalculated.

Which school does Baize follow?

At the casting layer, none in particular: it applies the public sexagenary rules and states the three contested switches — true solar time on by default, late rat hour by the traditional rule, solar terms timed to the minute. At the reading layer it works from the month command and marks where methods diverge rather than pretending there is one answer.

Is the guqin comparison actually valid?

The analogy is structural, not essential. What the two share is an incomplete notation layer — tablature omits rhythm, the four pillars omit how to read them — so multiple versions necessarily grow on top. That structural likeness is enough to separate what can be checked from what cannot.

Two schools reach opposite conclusions on my chart. Which do I trust?

First ask which method each used. If the methods differ, the conclusions are not contradictory — they answer different questions. If both claim the same method and still disagree, go back to the input and verify the hour and the solar term.

With so many schools, where should a beginner start?

With whichever one can state its casting conventions clearly. If the chart cannot be reproduced, the reading on top of it cannot be checked. Learn to cast the same chart first, then look at how different methods read it.

The argument about schools is really about one score and several performances. What matters is not which school is better known, but which conventions produced the chart in front of you.

Ask Baize these first — ready to paste:

• Which conventions was my chart cast with — how were true solar time and the late rat hour set?
• If my birth hour were off by one unit, which parts of the reading would change?
• Which method did this judgement use, and what would another method say?

It answers from your chart, not from a generic FAQ.

To see what you can keep doing without it collapsing, the Talent & Career Blueprint reads your strengths and rhythm from the whole chart, not from a single placement.

First time on Baize and not sure which step comes first? The full order — chart, question, review, coming back — is in Start Here: How BaZi Reading Works.

This page is for cultural study and self-reflection. It is not a predictive promise, nor medical, legal, investment or career advice.