Stage 2 · Term 22 of 34
Day Master Strength 身强身弱
Shēn Qiáng / Shēn Ruò
Whether the Day Master is well-supported (strong) or under-supported (weak) given the season, roots in the branches, and stem support. Strength assessment decides what the chart needs — it is the hinge between knowing the labels and actually reading a chart.
In the classics
《滴天髓》's doctrine is that strength is about qi and flow, weighed chiefly from the season (得令), rooting (得地), and support (得势) — the multi-factor frame jingku encodes as the four attainments. 《子平真诠》 makes strength the precondition for every structure judgment.
In a chart
Strength is the hinge of the whole system: it converts labels into verdicts. Nothing in a chart can be judged favourable or unfavourable until you know whether the Day Master can carry it — Wealth enriches the strong and buries the weak; Officer dignifies the strong and oppresses the weak; peers crowd the strong and rescue the weak. Assessment weighs season first, then roots in the branches (via hidden stems), then the mass of support versus drain across all eight characters. It is also where honest schools admit borderline charts exist — and where mechanical scoring ends and trained judgment begins.
Worked example
A 甲 wood Day Master born in spring (in season), seated on 寅 (rooted), with a 癸 water stem nearby (supported) is strong by every factor. Move the same 甲 to an autumn month and unroot it, and every verdict in the chart flips.
Where beginners misread it
Equating strong with good. Strong means load-bearing, nothing more; many demanding, brilliant charts are classically weak, and many strong charts are merely stubborn.
Spotting the three factors is countable by a beginner. Weighing the borderline chart is why lineages exist — that judgment is taught at Yixin Academy, not read off a table.
learnwithyixin.com/courses →What does Day Master Strength mean in BaZi?
Whether the Day Master is well-supported (strong) or under-supported (weak) given the season, roots in the branches, and stem support. Strength assessment decides what the chart needs — it is the hinge between knowing the labels and actually reading a chart.