A belongs to the poplar, belongs to the east, and G belongs to the yangjin, which belongs to the west. Yang and Yang repel each other, and Jin Mu repel each other. The two directions are opposite, so it is called collision. The rest of the dry phase conflicts and so on.
If there are words A and G in the eight-character sky, then the words A and G collide. However, the blow of the eight-character theory is more about Geng Jia than rushing. And so on.