Root Strength Grading — Level × Position = Actual Force
A ben-qi root in the Month Branch and a ben-qi root in the Year Branch — same level, nearly 40% difference in actual support
Root strength isn't just a three-tier system (ben-qi = 3, zhong-qi = 2, residual-qi = 1). Position matters equally. The Month Branch is closest to the Day Pillar and carries the seasonal authority — a ben-qi root there is the strongest possible, worth approximately 5 points. The Day Branch is the DM's own seat — a ben-qi root there is worth approximately 3.6 points. Year or Hour Branches are distant — a ben-qi root there is worth approximately 3 points. The formula: Root Force = Level Score × Position Multiplier. Same root level, different position = significantly different actual support. This positional weighting explains why two charts with 'the same roots' can have DMs of completely different actual strength.
Root force = level (ben-qi/zhong-qi/residual-qi) × position (Month > Day > Year/Hour). Month + ben-qi = strongest (~5 pts). Day + zhong-qi = moderate (~2.4 pts). Year/Hour + residual-qi = weakest (~0.8 pts — nearly useless). Same-level roots in different positions can differ by up to 40% in actual support. Also: same-pillar roots (stem sits on its own root in its own branch) get an additional affinity bonus.
1. The root-force multiplication table
Month Branch × ben-qi root: 3 × 1.6 = 4.8 points (strongest possible root — any stem with this root stands very firmly). Day Branch × ben-qi root: 3 × 1.2 = 3.6 points. Year/Hour Branch × ben-qi root: 3 × 1.0 = 3.0 points. Month × zhong-qi root: 2 × 1.6 = 3.2 points (a zhong-qi root in the Month Branch actually rivals a ben-qi root in distant branches — position can upgrade a lower-level root). Day × zhong-qi: 2 × 1.2 = 2.4 points. Year/Hour × zhong-qi: 2 × 1.0 = 2.0 points. Month × residual-qi: 1 × 1.6 = 1.6 points. Day × residual-qi: 1 × 1.2 = 1.2 points. Year/Hour × residual-qi: 1 × 0.8 = 0.8 points (weakest root — provides virtually no useful support). The table reveals a critical insight: a Month + zhong-qi root (3.2) actually outperforms a Year/Hour + ben-qi root (3.0). Position can overcome a one-level deficit. Never assess a root by level alone.
2. Same-pillar roots — the affinity bonus
When a Heavenly Stem sits directly on a branch that contains its own qi (same pillar), the root gets an additional affinity bonus of 5-10%. The stem and its sitting branch are in the same pillar — there's an intimacy that distant roots don't have. The Day Stem sitting on the Day Branch with a root (日坐根, ri zuo gen) is the most valuable configuration — it's the DM sitting on their own root, in their own seat, with the same-pillar bonus. This is the most secure foundation a DM can have. A Companion star sitting on its own root in the Month Pillar is similarly powerful — it's a support ally that's deeply grounded. The same-pillar bonus explains why some charts feel stronger than their numerical root score suggests — the roots that exist are positioned for maximum transfer efficiency.
3. Root degradation — clash and combination damage
Roots aren't static. When the branch containing the root gets clashed (冲, chong), the root force drops 30-50%. A clashed ben-qi root in the Month Branch (4.8) can degrade to ~2.9 — equivalent to a Year-branch ben-qi root. When the branch gets combined (合, he), the root's energy gets entangled with another branch, reducing its availability to the DM by 20-30%. A combined root still provides partial support, but the force is divided. Luck-cycle clashes and combinations cause temporary root degradation — during a clash year, the DM's foundation is temporarily weakened. Mark these years on the timeline: when the DM's primary root gets clashed, it's a year for conservative positioning, not expansion. A DM with a 4.8-point Month root operating at clash-degraded 2.4 points is effectively a different person that year.
4. Total root score — adding it up and what it means
Add up all the DM's root scores from all four branches to get the total root force. Below 2 points: dangerously weak — the DM is rootless or nearly so. Treat as tai-ruo (extremely weak) for strategy purposes. 2-4 points: moderately weak to neutral — the DM has enough root to receive support when it arrives. Standard pian-ruo or balanced strategies apply. 4-7 points: moderately strong — the DM has a solid foundation. Can be controlled or drained. 7+ points: strong to extremely strong — check for tai wang indicators. The total root score is a quantitative complement to the qualitative strength assessment. Two DMs can both be 'moderately weak' but have root scores of 2.2 vs. 3.8 — the difference in actual resilience is significant, and the luck-cycle strategies should reflect it.
5. The hidden strength — Companion and Seal roots count too
The DM isn't the only stem whose roots matter. Companion stars (same element as DM) with strong roots provide indirect support — they're the DM's 'allies with resources.' A Companion with a Month + ben-qi root is a powerful supporter even if the DM's own roots are modest. Seal stars with strong roots are reliable producers — they consistently feed the DM. When assessing DM strength, look beyond the DM's own roots to the roots of the supporting cast. A DM with 2.5 points of personal root but a Companion ally with 4.8 points is stronger than the raw DM root score suggests. The support network's rooting determines how reliably the support actually arrives. A floating Companion (no root) is a friend who means well but can't actually help. A deeply-rooted Companion is the ally who shows up with resources.
How to Think About This
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Source Texts
Practical Plays
- Carry the root-force table in your head: Month+ben = 5, Month+zhong = 3.2, Month+yu = 1.6. Day+ben = 3.6, Day+zhong = 2.4, Day+yu = 1.2. Year/Hour+ben = 3, Year/Hour+zhong = 2, Year/Hour+yu = 0.8. Total below 2 = dangerous. Total above 4 = solid foundation. Quick mental math for every chart you read.
- Mark root-clash years on the calendar: When a luck cycle or annual branch clashes the DM's primary root branch, that year's root force drops 30-50%. Tag those years. During clash years, plan conservatively — reduce commitments, protect health, avoid launching new ventures that depend on sustained personal force.
- Read the supporting cast's roots, not just the DM's: A deeply-rooted Companion or Seal provides reliable support even if the DM's own roots are modest. A floating support star means the chart promises help that can't actually land. Assess the whole support team's foundation before concluding the DM is weak or strong.
Follow-ups
Q:Which is worse for a root — being clashed or being combined?
A:
Clash (冲) is worse — it's a direct collision that consumes a larger portion of root force (30-50% degradation). Combination (合) also weakens the root but preserves more residual force (20-30% degradation) because the root's energy is entangled rather than destroyed. A clash year on the primary root is higher risk than a combination year.
Q:Can a residual-qi root ever be meaningful?
A:
Only in the Month Branch with no clash — Month × residual-qi gives 1.6 points, which is still weak but at least provides a thread of connection. Year/Hour residual-qi at 0.8 is functionally negligible. A DM whose only 'root' is a Year-branch residual-qi should be treated as rootless for practical purposes. The root exists on paper but provides no real support.