The explanation of hitting each other.

There is heavenly stems and earthly branches in life. Each has its own attributes, namely, five elements, Jin Mu, fire, water and earth.

Xiangke: Jin Kemu, Muketu, Tuke water, water, fire, fire and gold.

The vernacular explanation is: gold cuts wood like an axe, wood consumes soil like a tree, soil can hold back water, water can extinguish water, and water can melt gold.

There are good things and bad things in life, just as bad things are good for you and good things are bad for you.