BAZI KNOWLEDGE BASE
What Is Mountain Fire (山頭火) in BaZi?
Mountain Fire is the fire-class Nayin (a separate named element classification for a complete pair of chart symbols) assigned to 甲戌 and 乙亥. Classical sources compare it with field burning, dry grass, and a distant sunset on a mountain, then require named mountains, woods, wind, and regulating waters; the image does not prove visibility, fame, anger, wildfire, travel, altitude, or ordinary fire strength.
What does Mountain Fire establish first?
Mountain Fire is the Nayin name for a complete 甲戌 or 乙亥 pillar, and its Nayin phase is Fire. It may occur in the Year, Month, Day or Hour Pillar (the two-symbol column for the birth hour). The lookup unit is always one stem–branch pair in the same pillar, never a single character or a cross-pillar combination.
This lookup establishes one historical classification. 甲 remains a Wood stem and 戌 a Earth branch; 乙 remains a Wood stem and 亥 a Water branch. Nayin Fire does not overwrite those ordinary Five-Phase facts.
How can you check for Mountain Fire?
Read each complete pillar in an already calculated chart. A pillar that is exactly 甲戌 or 乙亥 has the Mountain Fire Nayin. One matching character, a zodiac animal or a real-world object is insufficient.
| Complete Jiazi | Stem phase | Branch phase | Nayin name | Nayin phase |
|---|---|---|---|---|
| 甲戌 | Wood | Earth | Mountain Fire | Fire |
| 乙亥 | Wood | Water | Mountain Fire | Fire |
Worked example: how should a 甲戌 Year Pillar be recorded?
Suppose the Year Pillar (the two-symbol column for the birth year) is 甲戌. The table returns Mountain Fire. A clear record says: Year 甲戌; stem 甲 is Wood, branch 戌 is Earth; Nayin is Mountain Fire, classed as Fire. This keeps the Nayin field separate from ordinary elemental data.
If 乙 appears only in the Month Pillar (the two-symbol column for the birth month) and 亥 only in the Day Pillar (the two-symbol column for the birth day), they do not form the same-pillar 乙亥 combination and do not create Mountain Fire. Complete pairing comes before image interpretation.
Why does the source use the name Mountain Fire?
San Ming Tong Hui compares Mountain Fire with autumn field burning, dry grass, and the glow of a setting sun. It favors a real mountain basis plus Great Forest or Pine-Cypress Wood carrying wind, and it distinguishes 甲戌 from 乙亥 when named waters meet their own stem-branch positions. Well-Spring, Stream-Below, Great Stream, Heavenly River, and Great Sea waters are not interchangeable. Rain, dew, or clear water can prevent excessive dryness, while too many other fires, unsupported earth, clashes, or punishments change the reading. Verify the mountain, wood, and wind support. Check whether the named water regulates or conflicts.
What value does Mountain Fire offer a modern reader?
Its practical value is precise lookup: 甲戌 and 乙亥 share this Nayin name, which lets you locate the pair’s distinctive source image and conditions. If another pillar enters an older rule, record that full Jiazi, its location and the source before drawing a comparison.
Keep the reading order explicit: verify calendar inputs and the Four Pillars; retain stems, branches and hidden stems; evaluate Month Command and Day-Master structure; only then add Mountain Fire as a Nayin layer. One Nayin name does not determine strength, Useful God, personality, work, relationships, wealth, health or event timing.
Continue reading
- Complete table of the thirty Nayin
Return to the sixty-Jiazi sequence and verify neighboring pairs.
- Compare another Fire Nayin: Fire in the Furnace
A shared phase does not make two images or conditions interchangeable.
- Fire in ordinary Five-Phase analysis
Separate Nayin classification from actual chart relations.