Yang Wood (甲) 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 Wood’s Wood element in a specific dynamic, and that dynamic is what determines what the chart needs to balance — the useful god (用神).
Classical reading: 丁 (Yin Fire) to repel Metal as primary useful god, with 壬 (Yang Water) to escape Metal control + Wood support as secondary. The standard practitioner caveat: 秋木見金, 須丁火制之 — ‘autumn wood facing Metal needs Ding Fire to control it’. Avoid: more Metal (compounds the cutting), bare Earth without Fire.
Yang Wood born in Autumn sits under Metal’s seasonal control — the season that “cuts down” trees. The chart-holder typically faces heavy structural pressure during early-to-mid life. Yin Fire as useful god turns the threatening Metal into refined tool; Water can let the Wood flow past Metal’s grip.
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 Wood 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.