What Is Water Under the Stream (澗下水) in BaZi?
Identify the 丙子–丁丑 Stream-Below Water pair, its clear-water and metal-support conditions, and why the image cannot determine morality, money, health, or water strength.
Overview
Water Under the Stream is the water-class Nayin assigned to 丙子 and 丁丑. San Ming Tong Hui pictures clear water among mountains and favors particular metals while distinguishing soil, fire, and other waters by exact pair; historical moral, sexual, poverty, and harm claims are not modern facts.
At a glance
- Jiazi pair
- 丙子 · 丁丑
- Nayin phase
- Water
- Classical image
- Clear, fine water moving between mountains
- Source support
- Selected metal nourishment; soil and fire depend on exact pair
- Reading level
- Historical pair image; ordinary chart structure first
- OpenFate scope
- Deterministic auxiliary lookup; no score
Water Under the Stream belongs to 丙子 and 丁丑
The standard Nayin table assigns this name only to complete 丙子 and 丁丑 pillars. A Bing or Ding stem, a Zi or Chou branch, a stream near a home, or characters collected from different pillars cannot create it.
丙 and 丁 remain fire stems; 子 remains a water branch and 丑 an earth branch with their normal hidden stems. The Nayin water layer does not convert both pillars into ordinary water or cancel their fire stems.
- Use a complete Jiazi match.
- Preserve the ordinary stem, branch, and hidden-stem structure.
Clear water and metal nourishment are pair-specific
San Ming Tong Hui describes fine, clear water moving through a mountain setting and favors selected Sand Gold and Sword Edge Gold support. It separately evaluates Hairpin Gold, particular stem combinations, and the risk of clashes rather than treating every metal as identical nourishment.
Wood, earth, fire, and other waters are also divided by amount, position, and exact Nayin pair. The source includes social, sexual, financial, and harm judgments typical of its period; responsible modern editing retains the structural conditions but rejects those claims as facts about a reader.
- Identify the exact supporting metal or conflicting pair.
- Separate usable structural rules from historical moral judgments.
Clear imagery is not a chart-wide water verdict
OpenFate deterministically maps 丙子 and 丁丑 to Water Under the Stream. Compatibility analysis keeps the result auxiliary and non-scoring, so it cannot overturn direct pillar relations, chart structure, or favorable-element analysis.
Actual water strength and usefulness still depend on Month Command, roots, hidden and exposed stems, support, control, combinations, clashes, dryness, moisture, and timing. “Clear” describes a classical image, not the quality or amount of water in the whole chart.
- Keep the Nayin label outside the scoring model.
- Judge ordinary water from complete chart evidence.
Clear or muddy water does not measure morality
Water Under the Stream cannot prove purity, honesty, sexual conduct, poverty, wastefulness, emotional instability, illness, disaster, or social reputation. Clear and muddy water in a historical metaphor are not moral or clinical categories.
Relationship, health, credit, employment, safety, and financial decisions require consent and verifiable evidence. Never use this Nayin to shame, diagnose, screen, or predict harm to a person.
- Remove morality, sexuality, poverty, and health claims.
- Keep consequential judgments grounded in real evidence.
Sources and editorial basis
- 《三命通會》 (Sanming Tonghui)卷一「丙子丁丑澗下水」：山環清水、砂中劍鋒金養及木土火水的具名條件A historical compilation covering stems and branches, Ten Gods, Nayin, Shen Sha, and multiple classical pattern systems.
- OpenFate Editorial Methodology原文道德、性行為、貧富、健康與災禍斷語不作現代個人事實；正五行與納音分層OpenFate separates deterministic chart calculation, traditional interpretation, and modern editorial explanation.