Yang Fire (丙) born in Autumn (秋) means the chart-holder’s day pillar — the central axis of any BaZi reading — is set against the seasonal context of Metal dominance. The Autumn season covers the lunar months 申 (Monkey), 酉 (Rooster), 戌 (Dog), anchored by the solar terms Liqiu to Lidong (roughly Aug–early Nov). In Five Phases terms, Metal’s prevailing energy through these months interacts with Yang Fire’s Fire element in a specific dynamic, and that dynamic is what determines what the chart needs to balance — the useful god (用神).
Classical reading: 甲 (Yang Wood) for fuel and structural support as primary useful god, with 壬 (Yang Water) for balance, when chart is otherwise strong as secondary. The standard practitioner caveat: 秋丙逢甲, 文采可觀 — ‘autumn Bing meeting Yang Wood produces visible cultural achievement’. Avoid: more Metal (drains/controls), bare Water without Wood support.
Yang Fire born in Autumn is the sun in waning season — needs fuel to keep burning. The chart-holder relies on Yang Wood as useful god for sustained output; without Wood, energy fades through the chart-holder’s middle years. With Wood, the configuration produces creative or scholarly success.
An honest disclosure. Useful-god analysis at the Day Master × season level is one input into a much larger calculation. The actual useful god for any chart is determined by combining: (1) the chart structure (格局), (2) the Day Master strength rating (旺衰), (3) the prevailing element across all four pillars, (4) the hidden stems in the month branch (月令藏干), and (5) the active 10-year luck phase (大運). What this page describes — Yang Fire in Autumn — is the ‘default’ reading; charts with unusual structures or special configurations override the default. For your actual chart, book a consultation or learn to do the synthesis yourself in the BaZi Bootcamp.