三合 4 Trio-Branches
申子辰合
水局亥卯未合木局寅午戌合火局巳酉丑合金局○考原曰三合者取生旺墓三者以合局也
- 水生於申旺於子墓於辰故申子辰合水局也
- 木生於亥旺於卯墓於未故亥卯未合木局也
- 火生於寅旺於午墓於戌故寅午戌合火局也
- 金生於巳旺於酉墓於丑故巳酉丑合金局也
今按淮南子云
- 木生於亥壯於卯死於未三辰皆木也
- 火生於寅壯於午死於戌三辰皆火也
- 土生於午壯於戌死於寅三辰皆土也
- 金生於巳旺於酉死於丑三辰皆金也
- 水生於申壯於子死於辰三辰皆水也
故五勝生一壯五終九五九四十五故神四十五日而一徙以三應五故八徙而歲終由今考之隂陽家言三合者唯水火木金而已不及於土也然言隂陽之書淮南子亦可為古矣所為三合之說未必不始於是書而土之三合則不傳於世者何歟且世所言土之長生等十二位與火無異而淮南子則謂
生午壯戌死寅亦他書所無有也今附載於此以備一義

| 三合 Trio-Branches | G0長生Growth | G4帝旺Prosperity | G8墓Tomb |
|---|---|---|---|
| X4㊌WATER | E8申 | E0子 | E4辰 |
| X0㊍WOOD | E↋亥 | E3卯 | E7未 |
| X2㊋FIRE | E2寅 | E6午 | E↋戌 |
| X3㊎METAL | E5巳 | E9酉 | E1丑 |
Kaoyuan (Investigation of Origins) ctext states: TRIO-HARMONY are formed by uniting the stages of G0长生Growth, G4帝旺Prosperity, and G8墓Tomb to create groups.
- ㊌WATER is grown in B8申W30S, prospers in B0子NORTH, and is tombed in B4辰E30S, thus, B8申W30S, B0子NORTH and B4辰E30S are TRIO-HARMONY of ㊌WATER.
- ㊍WOOD is grown in BB亥N30W, prospers in B3卯EAST, and is tombed in B7未S30W, thus, BB亥N30W, B3卯EAST and B7未S30W are TRIO-HARMONY of ㊍WOOD.
- ㊋FIRE is grown in B2寅E30N, prospers in B6午SOUTH, and is tombed in BA戌W30N, thus, B2寅E30N, B6午SOUTH and BA戌W30N are TRIO-HARMONY of ㊋FIRE.
- ㊎METAL is grown in B5巳S30E, prospers in B9酉WEST, and is tombed in B1丑N30E, thus, B5巳S30E, B9酉WEST and B1丑N30E are TRIO-HARMONY of ㊎METAL.