What You Are Looking At
You entered your birth data. Now you are looking at four columns. Each column has two Chinese characters stacked vertically. The top character is a Heavenly Stem. The bottom character is an Earthly Branch. Together, each column is called a pillar.
Four pillars. Eight characters. That is BaZi. 八字. Eight characters.
Those eight characters contain your elemental constitution, your relationship dynamics, your timing, your constitutional strengths, and the specific gaps that define what you need from other people and from specific decades of your life.
This page teaches you how to read them.
The Four Pillars
Each pillar represents a different domain of your life. Read them right to left, the way Chinese text was originally written.
Year Pillar (年柱): The era. The world you were born into. Your relationship with society, with authority, with the structures that existed before you arrived. This is the outermost layer. The furthest from your core self. Grandparents live here. Early childhood lives here. The pressures the world placed on you before you had any say in the matter.
Month Pillar (月柱): The family. Your parents. Your upbringing. The environment that shaped you between ages 1 and 18. The skills and wounds the family gave you. This is closer to your core but still external. You did not choose your family. The month pillar is what they chose for you.
Day Pillar (日柱): You. The top character of the Day Pillar — the Day Master — is the single most important character in the entire chart. It is your elemental identity. Everything else in the chart is read in relationship to this one character. The bottom character of the Day Pillar represents your closest intimate relationship. Your spouse. Your partner. The person who sits across from you at the table.
Hour Pillar (时柱): The innermost self. Your private world. What you are when nobody is watching. Your children. Your legacy. The second half of life. The hour pillar reveals what is hidden, what develops late, and what you pass forward.
If you do not know your birth hour, the chart reads three pillars instead of four. You lose the innermost layer but the outer three still hold. Find the hour if you can. It is worth the search.
The Day Master — Who You Are
The top character of your Day Pillar. This is your element. Your constitutional identity. There are ten possible Day Masters, and yours determines how every other character in the chart relates to you.
The ten Day Masters are the ten Heavenly Stems, divided into five elements with a Yang and Yin version of each:
Water: 壬 (Yang Water, the ocean) and 癸 (Yin Water, the rain) Wood: 甲 (Yang Wood, the great tree) and 乙 (Yin Wood, the vine) Fire: 丙 (Yang Fire, the sun) and 丁 (Yin Fire, the candle) Earth: 戊 (Yang Earth, the mountain) and 己 (Yin Earth, the fertile field) Metal: 庚 (Yang Metal, the axe) and 辛 (Yin Metal, the jewel)
Yang versions are bigger, more outward, more forceful. Yin versions are smaller, more inward, more precise. Same element. Completely different instrument. The ocean and the raindrop are both water. They do not move through the world the same way.
Your Day Master does not change. It is the one fixed point in a chart full of moving parts. Everything else — the other stems, the branches, the decades, the annual influences — changes around it. The Day Master is the lens through which all of it is read.
The Earthly Branches — What Is Underneath
← The Day Master — Who You Are
The bottom character in each pillar is an Earthly Branch. There are twelve branches, corresponding to the twelve animals of the Chinese zodiac: 子 Rat, 丑 Ox, 寅 Tiger, 卯 Rabbit, 辰 Dragon, 巳 Snake, 午 Horse, 未 Goat, 申 Monkey, 酉 Rooster, 戌 Dog, 亥 Pig.
The branches carry more than one element. Inside each branch are hidden stems — one, two, or three Heavenly Stems buried inside the branch, each carrying its own elemental energy at different strengths.
This is why BaZi is deeper than it looks on the surface. The eight visible characters are the architecture. Inside the four branches are additional stems that make the chart denser, more complex, and more specific than eight characters alone could produce.
When a reading says "your chart has hidden Metal in the month branch," it means Metal energy is present but not visible on the surface. It operates underneath. It influences the chart without announcing itself.
The Five Elements — The Building Blocks
← The Earthly Branches — What Is Underneath
Every character in your chart carries one of five elements. The interaction between these elements across your four pillars creates the story of your life.
Water 水: Depth. Intelligence. Flow. Strategy. The element that finds the lowest path and fills it.
Wood 木: Growth. Direction. Ambition. The element that always moves upward.
Fire 火: Warmth. Visibility. Connection. The element that illuminates.
Earth 土: Stability. Grounding. Accumulation. The element that holds.
Metal 金: Precision. Refinement. Decisiveness. The element that cuts.
The elements produce each other in a cycle: Water nourishes Wood. Wood feeds Fire. Fire creates Earth. Earth produces Metal. Metal generates Water.
The elements also control each other: Water controls Fire. Fire controls Metal. Metal controls Wood. Wood controls Earth. Earth controls Water.
Your chart has some elements in abundance, some present lightly, and some completely absent. The elements that are heavy are your constitutional strengths. The elements that are absent are your curriculum — what you learn through other people, through specific decades, and through deliberate practice.
A chart with zero Fire is not broken. It is a chart designed to operate without visibility for a specific number of years. The Fire arrives through timing, through relationships, or through the career. When it arrives, everything built in the dark becomes visible.
No element is good or bad. Every element is a building block. What matters is the specific combination in your chart and how you direct it.
The Ten Gods — What the Elements Do to Each Other
← The Five Elements — The Building Blocks
Once you know your Day Master, every other stem in the chart has a specific relationship to you. These relationships are called the Ten Gods. They describe what each element does relative to your Day Master.
Same element as you: 比肩 (Shoulder to Shoulder) — peers, competitors. 劫财 (Rob Wealth) — the rival, sibling energy.
The element you produce: 食神 (Eating God) — natural expression, creativity. 伤官 (Hurting Officer) — challenging expression, talent that disrupts.
The element you control: 偏财 (Indirect Wealth) — unconventional income. 正财 (Direct Wealth) — steady income, salary.
The element that controls you: 七杀 (Seven Killings) — external pressure, intense. 正官 (Direct Officer) — structure, authority.
The element that produces you: 偏印 (Indirect Resource) — unconventional support. 正印 (Direct Resource) — direct support, the mother figure.
When the reading says "七杀 in your Year Pillar," it means the element that controls your Day Master appears in the earliest, most external part of your chart. Translation: the world pressured you from the beginning. That is not a verdict. It is a data point. What you did with that pressure is your story.
The Nayin — The Sound of Your Pillar
← The Ten Gods — What the Elements Do to Each Other
Every pillar has a Nayin — a poetic name that describes the quality of its elemental energy. There are 30 Nayin types, each shared by two of the 60 possible pillar combinations.
Your Day Pillar Nayin describes the quality of your personal element. Not just "Water" but what kind of water. 长流水 (Long Flowing Water) is directional, sustained, carving deeper every year. 大海水 (Water of the Great Sea) is vast, borderless, containing everything. Same element. Different instrument.
The Nayin adds texture to the reading. It is the difference between knowing someone is a writer and knowing they write with a scalpel.
How Decades Work
← The Nayin — The Sound of Your Pillar
Your life unfolds in ten-year chapters called decade pillars (大运). Each decade brings a new Heavenly Stem and Earthly Branch combination. Each decade carries its own elemental energy. Each decade activates different parts of your chart.
The decade sequence is calculated from your birth data. It is fixed. The order does not change. But the experience of each decade depends on how its energy interacts with your natal chart.
Some decades bring the element you need most. These decades feel expansive. Supported. Like the wind is at your back.
Some decades bring the element that challenges you most. These decades feel like resistance. Pressure. Like the world is testing whether the foundation can hold.
Neither type is good or bad. The decade that feels hardest is often the decade that builds the most. The decade that feels easiest is often the decade where the least construction happens.
Every decade also carries a lifecycle phase — one of twelve stages from 长生 (Birth) through 帝旺 (Peak) through 绝 (Extinction) and back to 胎 (Conception). These phases describe the energy available to you during that decade.
绝 is not death. It is the space after the exhale, before the next breath. The old structure dissolving so the new one can form.
胎 is not birth. It is the seed forming. The new life taking shape inside the dissolution.
帝旺 is not success. It is the window where the energy is highest. What you do with the window determines whether it produces results.
The reading maps your full decade sequence from birth to the end of the chart. Every decade is specific. Every transition is structural. Nothing is random.
What The Reading Actually Does
When you receive your BaZi reading from 知己, the AI is doing several things simultaneously:
1. Reading your Day Master to establish your elemental identity. 2. Mapping every other stem and branch in relationship to your Day Master using the Ten Gods. 3. Counting elements — what is heavy, what is light, what is absent. 4. Reading the hidden stems inside each branch to find what is operating underneath the surface. 5. Identifying your current decade and lifecycle phase. 6. Cross-referencing your BaZi with your ZWDS palace grid (a second system that maps how your stars move through time). 7. Identifying the I Ching hexagram that describes your current position. 8. Synthesising all of it into the single most important thing to name right now.
The reading is not a personality test. It is not a horoscope. It does not predict what will happen to you. It maps the instrument you were born with, the season you are currently in, and the specific actions that match both.
What you do with the map is yours.
The Year Boundary — Why This Matters
← What The Reading Actually Does
BaZi uses 立春 (Start of Spring) as the year boundary, not January 1st and not Lunar New Year. 立春 typically falls on February 3rd, 4th, or 5th.
If you were born before 立春 in your Gregorian birth year, your BaZi year is the previous year. This can change your entire Year Pillar, which changes your decade sequence, your Nayin, and significant parts of the reading.
If you were born in late January or early February, verify which side of 立春 your birthday falls on. The difference of one day can produce a completely different chart.
The Hour Boundary — Why This Also Matters
← The Year Boundary — Why This Matters
BaZi divides the day into twelve two-hour blocks called 时辰. Each block corresponds to one Earthly Branch.
The most critical boundary: 子时 (Zi hour) spans 23:00 to 01:00, crossing midnight. In traditional BaZi, the day changes at 23:00, not at midnight. A person born at 23:30 on February 1st has the day pillar of February 2nd.
If you were born near 11pm, verify whether your chart was calculated using the 23:00 boundary or the midnight boundary. The difference can change your Day Pillar and your Hour Pillar simultaneously.
If your birth time is approximate ("around 9pm"), the chart is still valuable but the hour pillar is uncertain. The reading acknowledges this. If your birth time is completely unknown, the chart reads three pillars instead of four. It is still worth reading. It is also worth finding the exact time if you can.
Solar Time — The Singapore and Southeast Asia Note
← The Hour Boundary — Why This Also Matters
BaZi uses local solar time, not clock time. Singapore's timezone (UTC+8) is based on the 120°E meridian, but Singapore sits at approximately 103.8°E. The solar time correction is roughly minus 65 minutes.
A person born at 23:00 Singapore clock time has a solar time of approximately 21:55, which is 亥时 (Hai hour, 21:00-23:00), not 子时 (Zi hour, 23:00-01:00). This changes the Hour Pillar and potentially the Day Pillar.
知己 handles this correction. But if you have run your chart on a different calculator that uses clock time, your hour branch may be different. The discrepancy is not an error. It is a school difference. Both are legitimate approaches. 知己 defaults to solar time because it is the classical standard.
What To Do Next
← Solar Time — The Singapore and Southeast Asia Note
You now have the vocabulary to read your chart. You know what the four pillars are, what the Day Master means, how elements interact, what the Ten Gods describe, how decades work, and why the boundary dates matter.
The next step: run your chart. Read the reading. Then come back here when you want to understand something specific. The star pages explain each ZWDS star. The badge pages explain each pattern. The hexagram pages explain each I Ching position. Everything connects.
Your chart has been written since the moment you were born. 知己 just reads it back to you.