The friend star in BaZi is the stem that shares your day master’s element: the same wood, fire, earth, metal, or water you are made of, appearing elsewhere in the chart. Classical glossaries call the family 比劫, the companion pair, split into the Friend (比肩) and Rob Wealth (劫财). Below are the full 20-pair lookup, the ring it moves in, and the honest limits of the reading.
Key Takeaways
- The Friend star (比肩) is the same-element, same-polarity stem; Rob Wealth (劫财) is the same-element, opposite-polarity stem.
- Every day master owns exactly 2 companion stems, and all 20 pairings fit the table below.
- Resource stems (印) feed the companion camp, while Officer stems (官杀) apply the classical check.
- Many companion stems widen the self layer; whether that reads as support or rivalry is whole-chart territory.
- Find your day stem with the free BaZi calculator, then read your row in the table.
The Same-Element Rule Behind the Friend Star in a Birth Chart
A birth chart reads its roles from one anchor inside the Four Pillars system: the Day Master, the Heavenly Stem sitting over your day pillar. Ten roles hang off that anchor, sorted into five families by direction: what generates you, what you generate, what controls you, and what you control. The fifth is the friend star’s home, and the classical gloss compresses it to 同我者为比劫: what is the same as me becomes the companion pair.
Every element holds exactly 2 of the 10 Heavenly Stems, so every day master owns exactly 2 companion stems. Anyone whose day stem is Jia, regardless of birth year, reads the same two companion stems as any other Jia.
In practice, four of the families send their relations running one way or the other, in or out, pressing or pressed. The companion pair is the only one defined by sameness, which is why readings of it drift between flattery, another you, and rivalry, another you after the same things.
The Complete Friend Star Table for a BaZi Birth Chart
The table lists all 20 pairings, ten day masters and two companion stems each. Every row follows one rule: same polarity lands on the Friend (比肩), opposite polarity lands on Rob Wealth (劫财). Pull your day stem from any chart, then read across.
| Day Master | Friend stem (比肩) | Rob Wealth stem (劫财) |
|---|---|---|
| Jia (Yang Wood) | Jia | Yi |
| Yi (Yin Wood) | Yi | Jia |
| Bing (Yang Fire) | Bing | Ding |
| Ding (Yin Fire) | Ding | Bing |
| Wu (Yang Earth) | Wu | Ji |
| Ji (Yin Earth) | Ji | Wu |
| Geng (Yang Metal) | Geng | Xin |
| Xin (Yin Metal) | Xin | Geng |
| Ren (Yang Water) | Ren | Gui |
| Gui (Yin Water) | Gui | Ren |
Notice the middle column: for every day master, the Friend stem is the day master’s own stem, which is why classical readers gloss 比肩 as shoulder to shoulder, a same-sized self standing alongside.
Two structural facts keep the table honest: every element contributes exactly 2 of the 10 stems, so no row comes up empty, and the same 60 stem-branch pairings of the sexagenary cycle sit behind every row. The lookup never depends on birth year.
Friend and Rob Wealth: One Element, Two Faces in a Birth Chart
The naming is where casual summaries go wrong. Wealth, Officer, and Resource stems carry Direct and Indirect labels, split by polarity. The Companion and Output families keep their own fixed names instead, Friend versus Rob Wealth and Eating God versus Hurting Officer, two different relations to the self rather than degrees of one star.
For the 5 Yang day masters (Jia, Bing, Wu, Geng, Ren), the Friend stem is Yang and the Rob Wealth stem is Yin; the 5 Yin day masters (Yi, Ding, Ji, Xin, Gui) mirror it. Same polarity hugs the self and opposite polarity crosses it, the same yin-yang sorting that the Internet Encyclopedia of Philosophy outlines for Chinese cosmology.
The names carry the flavor readings. In my experience, the polarity split settles most of the argument before interpretation starts. 比肩, the Friend, is the peer: same footing, the colleague at your own rank. 劫财, Rob Wealth, is the claimant: close enough to reach what you reach for first. I have watched sibling-run workshops split along exactly this line, the steadier twin keeping the accounts while the bolder one bid for the same customers.
How the Companion Stars Move in a Birth Chart
Companion stars connect to every other family through the five-element cycle. Read from a Wood day master, the four moves run in fixed directions: Water generates Wood, so Resource stems feed the companion camp; Wood generates Fire, so the companion camp sits upstream of the Output stems; Metal controls Wood, so Officer stems apply the classical check; Wood controls Earth, so companion stems press sideways on the Wealth stems, whose lookup our wealth element guide covers stem by stem.
| Move in the ring | Direction | Classical shorthand |
|---|---|---|
| Resource (印) to Companion | generates | the feed line into your own camp |
| Companion to Output (食伤) | generates | talent downstream of the peers |
| Officer (官杀) to Companion | controls | the check that keeps the camp in line |
| Companion to Wealth (财) | controls | 比劫夺财, companions pressing wealth |
The Wealth press deserves trend language, not scare language. Charts where companion stems crowd the Wealth stems classically read as resources under shared custody, partners at the till in the old shorthand. Whether that turns into generous co-spending, contested bills, or genuine rivalry is whole-chart judgment, and whether it hardens into a named structure is another question. Where a chart runs thin on its own element and the Favorable Element (喜用神) analysis calls for reinforcement, the same two stems read as reinforcements instead.
The calendar visits the same pair. In the 2024 Jia Chen year, the year stem Jia stood in the year slot for a Jia day master as the Friend. The Rob Wealth stem arrived the same way: 2025 was the Yi Si year, and Yi took the year slot instead. One annual stem alone reads as a mild thematic signal, not a verdict.
Where the Friend Star Sits: Pillars and People in a Birth Chart
Placement colors the theme. Classical palace reading gives each of the 4 pillars a domain, and the month pillar, seat of parents, siblings, and the growing-up household, is where companion energy classically concentrates, with a rough life window from about 17 to 32. A friend star in the month pillar puts star and palace in one seat; elsewhere it still counts, including when it waits inside a branch, which our hidden stems guide maps branch by branch.
The storage trick is easy to check: the Tiger branch, Yin (寅), holds Jia Wood as its main qi, so a Jia day master keeps a Friend star in reserve inside any Tiger, and the Rabbit branch, Mao (卯), holds Yi Wood as its single qi, the Rob Wealth seat for the same chart.
Classical reading also projects the pair onto people, split by the chart owner’s gender, and the mapping below is the fixed convention our tables carry. The statements stay at signal strength: a placement tendency, never a headcount of your actual siblings.
| Star | Male chart (乾造) reads | Female chart (坤造) reads |
|---|---|---|
| Friend (比肩) | brothers | sisters |
| Rob Wealth (劫财) | sisters | brothers |
When I look for companion energy in a client’s chart, the month pillar is where I look first.
What the Friend Star Cannot Tell You About a Birth Chart
That said, the star layer holds three hard limits: it does not count friends, does not rank their loyalty, and does not time their arrival. Many companion stems widen the self’s footprint, and classical readers treat a crowded companion layer as amplification of the self camp, not as an address book. The common reading treats companion energy as a popularity score; the classical layer reads it as a footprint first.
A couple in our consultation files shows the sameness effect from the human side. Both were born in 1939, the Earth Rabbit year (Ji Mao), so both charts wore the same stem and branch at the year layer, each one the zodiac-layer cousin of the other’s companion theme. Their pairing files as a Same Sign match, scored 76 on the pair page, and the marriage ran 55 years; pair scores follow our methodology page. The account they gave matched the classical reading: understanding that felt near telepathic, shared blind spots that amplified each other, and their best stretch once travel kept breaking the echo. We read this as the companion theme in miniature: sameness supports, and sameness without outside input echoes.
Across our 78-pair dataset, Six Harmony pairs average 94.5 while all Six Clash pairs sit at 38, a spread the zodiac layer keeps while the ten-god layer never comes back empty. Every pair score is public on the compatibility hub, and the ten-god layer needs no list: every chart carries its two companion stems by construction.
A chart crowded with companion stems makes me check the Officer stems before anything else, because the check on the self camp is the first thing the ring implies. For most readers, the friend star is a mirror before it is a crowd: read the two stems as the places your own element already stands, then ask what the rest of the chart does with them.
Friend vs Rob Wealth in BaZi: what is the difference?
The difference between the Friend star (比肩) and Rob Wealth (劫财) in BaZi is polarity: both stems share the day master’s element, and the Friend matches its polarity while Rob Wealth sits opposite. For a Jia (Yang Wood) day master, a second Jia plays the Friend and Yi plays Rob Wealth; for a Yi (Yin Wood) day master, the same two stems swap roles. The relation is symmetric between people too: if your day stem is Jia and a friend’s is Yi, each of you lands in the other’s chart as the Rob Wealth stem, and two Jia day masters read each other as Friends. Flavor follows polarity, the peer at your own rank versus the claimant reaching for the same things. The lookup itself never moves.
Is it true that a lot of Friend star energy in BaZi means a lot of friends?
A lot of Friend star energy in a BaZi chart does not translate into a lot of friends, because the star measures the self layer’s footprint rather than social capacity. The mechanics cap the visible version first: a chart shows 4 stems, and with the day master holding one seat, at most 3 companion stems can stand beside it in the visible layer. Classical readers then check what the rest of the chart does with that crowd, Resource stems feeding it or Officer stems checking it. The caution runs both ways, since the two companion stems exist in every chart by construction and wait inside branches as hidden stems when no stem shows them. Friendship in a life is a people question; the chart only locates the theme.
Which house in Kundali is for friends, and is it the same as the BaZi friend star?
Kundali houses and the BaZi friend star answer the friendship question inside different systems, so the answers do not transfer directly. Vedic charts read life domains through a wheel of 12 houses; BaZi has no house wheel, reading instead from 4 pillars that carry 8 characters, with palaces layered on the pillar positions. The nearest BaZi equivalents live on the layers above: the companion star pair on the star layer and the month pillar’s siblings palace on the palace layer. Asking a Kundali house question inside a BaZi article mixes the two frames, the way asking for a BaZi score inside a house chart would.
How accurate are bazi readings, and can a friend star lookup be wrong?
BaZi readings are accurate exactly where the system is mechanical, and that boundary matters most for star lookups like the friend star. The stem tables, the polarity split, and the 20 companion pairings in this article are deterministic: run the same day stem through the engine and the answer cannot vary. Our engine validation page documents that layer with 736 assertions checked against 50 public cases. Interpretive layers sit on the other side of the line: flavor readings and palace emphases are frameworks for questions, not predictions about people. Anyone sizing up a reading can use that split as a test: ask which part of a statement a table produced and which part a person did.
Conclusion
The friend star distills to one rule and one fork: the two stems that share your element, split by polarity into Friend and Rob Wealth. The table gives the lookup, the ring gives the moves, and the limits keep the reading honest. Find your day stem with our free BaZi calculator and read your row.
Sources
Four Pillars of Destiny (Wikipedia): backs the Day Master anchor and the Ten Gods role table, including the Friend and Rob Wealth polarity definitions.
Wuxing / Five Elements (Wikipedia): backs the generation and control directions the companion ring runs on.
Yin and Yang (Internet Encyclopedia of Philosophy): backs the polarity logic behind the same and opposite split.
Hong Kong Observatory: backs the calendar methodology behind pillar calculation.
