BaZi Basics
BaZi Compatibility Basics
How BaZi compatibility is read: Day Master relations, day-branch interactions, mutual useful elements and timing — and why compatibility is not a pass/fail score.
BaZi Calculator · 2026/10/13
The Companion (比肩) and Rob Wealth (劫财) stars in BaZi: peers, competition and self-reliance, when they help a chart and when they compete for Wealth.
By BaZi Calculator · Updated 2026/10/13
Companions (比肩) and Rob Wealth (劫财) are the stems of the Day Master's own element. They represent peers, siblings, colleagues and the self's own reserves.
For a weak Day Master, Companions and Rob Wealth are support: allies, teamwork, the strength to carry Wealth and Officer. A weak chart that gains a Companion luck pillar often feels more capable.
For a strong Day Master, more of the same element is excess. Because they share the Day Master's element, they also control Wealth — the classic image is 比劫夺财, peers competing for the same wealth. Practitioners read this as shared costs, partnerships that split gains, or spending.
| Day Master \ stem | 甲 | 乙 | 丙 | 丁 | 戊 | 己 | 庚 | 辛 | 壬 | 癸 |
|---|---|---|---|---|---|---|---|---|---|---|
| 甲 | Friend | Rob Wealth | Eating God | Hurting Officer | Indirect Wealth | Direct Wealth | Seven Killings | Direct Officer | Indirect Resource | Direct Resource |
| 乙 | Rob Wealth | Friend | Hurting Officer | Eating God | Direct Wealth | Indirect Wealth | Direct Officer | Seven Killings | Direct Resource | Indirect Resource |
| 丙 | Indirect Resource | Direct Resource | Friend | Rob Wealth | Eating God | Hurting Officer | Indirect Wealth | Direct Wealth | Seven Killings | Direct Officer |
| 丁 | Direct Resource | Indirect Resource | Rob Wealth | Friend | Hurting Officer | Eating God | Direct Wealth | Indirect Wealth | Direct Officer | Seven Killings |
| 戊 | Seven Killings | Direct Officer | Indirect Resource | Direct Resource | Friend | Rob Wealth | Eating God | Hurting Officer | Indirect Wealth | Direct Wealth |
| 己 | Direct Officer | Seven Killings | Direct Resource | Indirect Resource | Rob Wealth | Friend | Hurting Officer | Eating God | Direct Wealth | Indirect Wealth |
| 庚 | Indirect Wealth | Direct Wealth | Seven Killings | Direct Officer | Indirect Resource | Direct Resource | Friend | Rob Wealth | Eating God | Hurting Officer |
| 辛 | Direct Wealth | Indirect Wealth | Direct Officer | Seven Killings | Direct Resource | Indirect Resource | Rob Wealth | Friend | Hurting Officer | Eating God |
| 壬 | Eating God | Hurting Officer | Indirect Wealth | Direct Wealth | Seven Killings | Direct Officer | Indirect Resource | Direct Resource | Friend | Rob Wealth |
| 癸 | Hurting Officer | Eating God | Direct Wealth | Indirect Wealth | Direct Officer | Seven Killings | Direct Resource | Indirect Resource | Rob Wealth | Friend |
Count where they sit: in the month they shape the whole chart's style; in the day branch (the Day Master's own seat) they are a root; in the hour they relate to later life and projects. Then decide by strength whether they are allies or competitors.
Both stars share the Day Master's element. The difference is polarity. For a 甲 wood Day Master, another 甲 is a Companion (same element, same polarity) and 乙 is Rob Wealth (same element, opposite polarity). For a 丁 fire Day Master, 丁 is a Companion and 丙 is Rob Wealth. The same logic applies to hidden stems: 寅 holds 甲 as main qi, so for a 甲 Day Master the 寅 branch is a strong Companion root, and 卯 (main qi 乙) is a Rob Wealth root. You can check every stem in your own chart with the Ten Gods calculator.
In practice the branches carrying the Day Master's element are the most important source of Companion strength, because they are roots. Two classical terms describe the strongest cases:
These are traditional structure names; they summarise strength rather than predict events. The twelve growth stages explain why these particular branches are singled out.
Companions and Rob Wealth make sense only after you have judged Day Master strength. The same two stars in two charts can mean opposite things:
| Situation | Typical reading |
|---|---|
| Weak Day Master, Companions present | Support, allies, the ability to hold Wealth and withstand Officer |
| Weak Day Master, no Companions or roots | The chart may rely heavily on Resource, or in extreme cases follow the dominant element |
| Strong Day Master, many Companions | Excess; competition for Wealth, independence that resists structure |
| Strong Day Master, Companions plus Officer | Balanced: peers within a structure, competition with rules |
The table is a starting point. Always confirm by looking at season and roots rather than counting characters.
Because the Day Master's element controls the Wealth element, Companions and Rob Wealth control Wealth too. In a strong chart, traditional texts read this as sharing or losing resources: partnerships that split profits, spending on friends, or competition for the same opportunity. In a weak chart facing heavy Wealth, the same control is helpful, because peers take some of the load. Modern readers often phrase it neutrally: a chart with strong Rob Wealth benefits from clear agreements whenever money and other people mix.
A Companion or Rob Wealth luck pillar strengthens the Day Master for ten years. Whether that feels supportive depends on the natal balance. A useful habit is to list the luck pillars from the luck pillar calculator and mark each one where the stem or branch main qi shares the Day Master's element. Then compare those decades with what the chart needs. For annual pillars the same method applies on a shorter scale; the annual pillar calculator lists the coming years.
Write down your Day Master, then mark every stem and every hidden stem with the same element. Separate them into Companion and Rob Wealth by polarity, note which pillar each sits in, and decide whether your Day Master is strong or weak. With those notes you will be able to say in one sentence whether peers act as support or as competition in your chart — which is exactly the question these two stars answer.
Is Rob Wealth always worse than Companion? No. Rob Wealth is more forceful and more often linked to competition, but whether that is helpful depends on strength.
What controls Rob Wealth best? Officer stars, especially Seven Killings, are the classical control. Output can also redirect it into productive work.
Does a strong Companion presence mean independence? That is a common modern reading, especially when Officer is weak.
Companions in the month are the 建禄 and 羊刃 structures described above. In the day branch they root the Day Master directly. In the year they are associated with background and peers early in life; in the hour, with collaborators later on. See pillar positions for the full scheme.
See also: day pillar and judging Day Master strength.
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