We also know that Yin Wu is called Yin Musheng Hoth.
Half a fire bureau, for the sake of fire, then the punishment for Yin has always been the original intention of half a fire bureau.
Think about it. Therefore, mutual punishment is also fire. Just like Yin Wu's half game, you should have one.
fire
Thoroughly dry
Only in this way (that is, C Yin and Si or d Si and Yin) can Yin Si be punished.