Sansheng gate? What does it mean?

Why is the enemy so shocked when he hears the words Sanshengmen?

The darkest and most mysterious of the four families in China is the Duanmu family.

But why does the Duanmu family so frighten the outside world? Make the outside world creepy? Not only because of his mystery, but also because of his viciousness.

Legend has it that in the Duanmu family there is an irrevocable poison called Sanshengmen.

If it is poisoned by Sanshengmen, it will die.

Everyone says that the Duanmu family is dangerous and poisonous, but what is the most powerful thing of the Duanmu family? It's their poison! They...