Seeking common sayings to explain eight-character terms

Your birthday is Geng Jin, and you were born in July (Shen Jinyue), so it's very hard. In this way, it is best to forge and refine metal products with ding huo; Without Ding Huo, it would be nice to have A or B (wood), because wood makes fire. If, in the eight characters, there is no Ding and Jia, only C fire, then an alchemist can't come out of the water. In this case, there can be no good luck in water transportation.