What does it mean to have Oracle Bone Inscriptions and Geng Jin in the eight characters?
There are two factors in the eight characters: Oracle Bone Inscriptions and Geng Jin, indicating that your year, month, day, hour and four pillars contain two factors. One is Jia (Jia Yin, Chen Jia, Wu Jia, Shen Jia, JOE and Jia Zi), and the other is Geng Jin (Geng Yin, Chen Geng, Wu Geng, Geng Shen, Geng Xu and Geng Zi), all of which belong to the category of heavenly stems.