一 What it is
What Fuyin and Fanyin Mean
Think of a calendar where two dates repeat the same weekday and number, or mirror each other across a month. In Bazi, Fuyin and Fanyin describe similar patterns between pillars: one repeats an exact stem-branch pair, while the other compares pillars in an opposed or reversed way. The first step is simply noticing the pattern, not judging it.
A visible chart label or lookup match is a structural observation. For example, if two compared positions both show 庚午, that is Fuyin: the same stem and same branch. Fanyin is the traditional term commonly used for an opposed or reversed comparison, but conventions vary, so readers must name the actual stems and branches being compared. This matters when you examine Annual Pillars, because a repeated pair in the natal chart and a repeated pair in an annual pillar are different comparisons.
Keep comparison scopes separate. Natal, luck and annual positions should not be merged into one label. Record the exact repeated pair for Fuyin, and state the two compared pillars explicitly for Fanyin.
What can this topic not prove? It cannot show that a person will feel sadness, suffer loss or meet a specific life event. Traditional labels are interpretive vocabulary, not empirical outcomes. A repeated or opposed pattern is a description of symbols, not a verdict about your life.
二 Where to find it in your chart
Finding the Luck Pillars Section
Scroll past the natal chart to the Luck Pillars panel. Its header shows the start age, the exact years, months and days counted from birth, and a forward or reverse direction. Year and Month boundaries use China time, while Day and Hour use true solar time, so the sequence follows those conventions.
Below the header, ten-year cards run in order. Each card lists one stem-branch pair with its start age, end age, start year and end year. The card covering the present year is highlighted, so you can see which decade is active at a glance.
Inside the highlighted card, an annual list gives one row per year: the year number, your age, the annual stem-branch, and a minor stem-branch. These rows are the Annual Pillars for that decade. Compare them with the natal chart using stem combinations and clashes and Six Clashes when you want to name exact pairs.
If your birth time is unknown, no Hour Pillar is calculated, and that can affect the calculated sequence. Treat the displayed start age and direction as the calculator’s output, then calculate your chart.
| Position | Year | Month | Day | Hour |
|---|---|---|---|---|
| Stem | 庚 | 辛 | 己 | 丙 |
| Branch | 午 | 巳 | 卯 | 寅 |
三 How to read it
How to Identify Fuyin and Fanyin Step by Step
Start by recording the four natal pillars exactly as calculated: year, month, day and hour. Each pillar is a stem-branch pair, so write both characters rather than a label. Year and month boundaries follow China time, while the day and hour pillars use true solar time. If the birth time is unknown, leave the hour pillar blank; do not invent one. This first record is a calendar fact, not an interpretation.
Next, note the Luck Pillar sequence. Record the start age, the forward or reverse direction, and the selected ten-year pillar. For example, one chart may begin at age 9, run forward, and open with 壬午; another may begin at age 4, run in reverse, and open with 庚辰. Then add the annual label for the year you are examining, such as 丙午. Keep natal, luck and annual positions in separate columns so comparisons never merge.
Only after this record is complete should you compare positions. Fuyin means the same stem and same branch appear in the two positions being compared. Fanyin is the traditional term commonly used for an opposed or reversed comparison, but conventions vary, so name the actual stems and branches and state which two pillars you are comparing. A comparison may involve natal, luck or annual positions; do not mix scopes. When stems interact, note stem combinations and clashes as separate calculated relationships, not as verdicts.
Finally, separate calculation from interpretation. The four pillars, start age, direction, selected Luck Pillar and annual label are calculated facts. Fuyin, Fanyin and any traditional label belong to later interpretive vocabulary. Neither term predicts sadness, loss or any life event, and a repeated or opposed pair is not automatically favourable or unfavourable. Follow the same order every time: record, compare, then interpret.
| Observable label | Members or basis | Bounded reading |
|---|---|---|
| Fuyin | same stem and same branch in the compared positions | record the exact repeated pair |
| Fanyin | the exact opposed comparison used by the reader’s school | state the two compared pillars explicitly |
| Comparison scope | natal, luck or annual positions | do not merge different comparisons |
四 When the reading changes
Repeated Labels Across Different Positions
A Fuyin is an exact repetition of the same stem and branch in the two positions being compared. In the sample chart 庚午 / 辛巳 / 己卯 / 丙寅, no two pillars share a stem-branch pair, so no Fuyin appears among the four natal columns. The check is mechanical: write each pillar as a two-character unit, then scan for identical units. Position matters even when the pair repeats. A repeated pair in the year and month columns sits in a different structural location from a repeat in the day and hour columns, and the calculator records the exact positions rather than treating every repetition as one phenomenon. The limited meaning is descriptive: the same stem-branch label occurs twice in the stated scope. It is not a verdict on temperament, fortune or any life event.
Hidden-Only Versus Visible Occurrence
Repeated labels can also be counted through hidden stems rather than visible stems. In the same chart, the month branch 巳 hides 丙, 庚 and 戊, while the hour stem is 丙 and the year stem is 庚. A reader comparing visible stems with hidden stems will find 庚 and 丙 appearing in both layers, yet this is not Fuyin, because Fuyin requires the same stem and the same branch together. The concrete check is to separate visible occurrences from hidden-only occurrences before naming anything. Hidden-stem weights of 1.0, 0.5 and 0.3 follow this calculator’s list-order convention, and raw totals are not a strength verdict. The visible Day Master counts in five-element totals but is excluded only from article weighted Ten-God totals.
Opposed Comparisons and Coexisting Relations
Fanyin is the traditional term commonly used for an opposed or reversed comparison, and conventions vary, so the reader must state the two compared pillars explicitly. One school may compare a Luck Pillar against the month pillar; another may compare the year pillar against the annual pillar. The sample chart’s active Luck Pillar 甲申 and the 2026 annual pillar 丙午 illustrate why scope must be named: these are separate comparisons, and merging natal, luck and annual positions produces confusion. A repeated or opposed pair can coexist with another relation, such as a stem combinations and clashes or a branch relation like the Six Clashes, and with a Ten-God category such as Hurting Officer or Direct Resource. Coexistence is a labelling fact, not a prediction of sadness, loss or any event.
Recording the Exact Pair and Scope
The practical method is to record the exact repeated pair, or the exact opposed comparison, and to name the scope: natal, luck or annual. For the 庚午 / 辛巳 / 己卯 / 丙寅 chart, the forward Luck sequence begins at age 9 with 壬午, and the reverse sequence begins at age 4 with 庚辰; these are different starting conditions, not competing verdicts. A reader checking an annual position should consult the Annual Pillars list and compare one stated pillar at a time. Neither Fuyin nor Fanyin predicts an outcome. They are interpretive vocabulary for describing repetition and opposition, and their meaning stays limited to the comparison actually made.
五 Worked chart examples
These teaching charts were screened by the site’s current calendar engine. They are not people or client stories. Tables and totals are generated from frozen engine rules; the prose only explains what is shown.
| Position | Year | Month | Day | Hour |
|---|---|---|---|---|
| Stem | 庚 | 辛 | 己 | 丙 |
| Branch | 午 | 巳 | 卯 | 寅 |
| Ten God | Hurting Officer | Eating God | Day Master | Direct Resource |
| Hidden stems | 丁 Indirect Resource (1) 己 Friend (0.5) |
丙 Direct Resource (1) 庚 Hurting Officer (0.5) 戊 Rob Wealth (0.3) |
乙 Seven Killings (1) | 甲 Direct Officer (1) 丙 Direct Resource (0.5) 戊 Rob Wealth (0.3) |
| Void pair | 戌亥 | 申酉 | 申酉 | 戌亥 |
Calculated Luck Pillar observation(s) — direction forward; start age 9; first Luck Pillar 壬午.
Chart A: Reading the Four Pillars Exactly
Chart A has four pillars: 庚午 in the year, 辛巳 in the month, 己卯 in the day, and 丙寅 in the hour. Read them as written. The year stem 庚 is labeled Hurting Officer; the month stem 辛 is Eating God; the day stem 己 is the Day Master; the hour stem 丙 is Direct Resource. These labels are interpretive vocabulary, not outcomes.
Each branch carries hidden stems. 午 hides 丁 and 己, listed as 偏印 and 比肩. 巳 hides 丙, 庚 and 戊, listed as 正印, 伤官 and 劫财. 卯 hides 乙, listed as 七杀. 寅 hides 甲, 丙 and 戊, listed as 正官, 正印 and 劫财. The calculator weights these hidden stems 1.0, 0.5 and 0.3 in list order; that is a convention, not a verdict.
For Fuyin, compare exact stem-branch pairs. No two pillars here repeat the same pair, so Chart A contains no exact repetition among its four natal pillars. For Fanyin, conventions vary, so name the two pillars being compared and the opposed relation your school uses. Do not merge natal, luck and annual comparisons.
Chart A’s luck sequence starts at age 9, runs forward, and opens with 壬午. The active luck pillar is 甲申, ages 29–38, covering 2018–2027. Its listed years include 2026 丙午 with minor pillar 癸卯. The visible Day Master counts in five-element totals but is excluded only from article weighted Ten-God totals. Raw totals are not a strength verdict.
Useful references: Annual Pillars, stem combinations and clashes, and Six Clashes.
| Position | Year | Month | Day | Hour |
|---|---|---|---|---|
| Stem | 庚 | 辛 | 己 | 丙 |
| Branch | 午 | 巳 | 卯 | 寅 |
| Ten God | Hurting Officer | Eating God | Day Master | Direct Resource |
| Hidden stems | 丁 Indirect Resource (1) 己 Friend (0.5) |
丙 Direct Resource (1) 庚 Hurting Officer (0.5) 戊 Rob Wealth (0.3) |
乙 Seven Killings (1) | 甲 Direct Officer (1) 丙 Direct Resource (0.5) 戊 Rob Wealth (0.3) |
| Void pair | 戌亥 | 申酉 | 申酉 | 戌亥 |
Calculated Luck Pillar observation(s) — direction reverse; start age 4; first Luck Pillar 庚辰.
Reading Chart B: Repeated and Opposed Pillars
Chart B has the natal pillars 庚午, 辛巳, 己卯 and 丙寅. Its Day Master is 己, and its Luck Pillars run forward from age 9, beginning with 壬午. The current Luck Pillar is 甲申, covering ages 29 to 38, and the 2026 Annual Pillar is 丙午.
Fuyin means an exact repetition of the same stem and branch in the positions being compared. In Chart B, the 2026 Annual Pillar 丙午 repeats the year pillar 庚午 in its branch only, so it is not an exact Fuyin. A true Fuyin would require both 丙 and 午 to appear together in the compared position. The correct method is to record the exact repeated pair rather than label the year loosely.
Fanyin is the traditional term commonly used for an opposed or reversed comparison, but conventions vary. Readers must state the two compared pillars explicitly and name the actual stems and branches. For Chart B, the 2026 Annual Pillar 丙午 can be compared with the year pillar 庚午: the branches match, while the stems 丙 and 庚 differ. Whether that counts as Fanyin depends on the school’s exact rule, so the comparison should be described, not assumed.
Chart A shares the same four natal pillars but runs in reverse from age 4, beginning with 庚辰. Its current Luck Pillar is 丁丑, and its 2026 Annual Pillar is also 丙午. The contrast is therefore not in the natal chart but in the Luck sequence and the resulting comparison scope. Chart B’s forward sequence places 甲申 beside 丙午; Chart A’s reverse sequence places 丁丑 beside 丙午. These are different comparisons and should not be merged.
A repeatable observation method:
- Write the two positions being compared, such as annual versus year.
- List each stem and branch separately.
- Mark an exact match as Fuyin only when both stem and branch repeat.
- For Fanyin, name the opposed pair and the school rule used.
- Keep natal, luck and annual comparisons separate.
- Treat labels as interpretive vocabulary, not outcomes.
For further background, see Annual Pillars, stem combinations and clashes, and Six Clashes.
六 Base-rate boundary
The full enumeration used by this site contains 518,400 valid Four Pillars combinations: 60 year pillars × 12 solar-month slots × 60 day pillars × 12 hour slots. This topic contains several possible labels or thresholds, so a single combined percentage would conceal which exact condition was counted.
Any later frequency must define one exact condition first and report an equal-weight combination-space proportion, not a percentage of people, income outcomes, careers or birth records. The presence of a label is not an event forecast.