In his seven-step poem, Cao Zhi suggested that brothers should not kill each other.

The original seven-step poem

Boil beans for soup,

Think of it as juice.

The mash burns under the pot,

The beans are crying in the kettle.

Born from the same root,

Why are you in such a hurry to blow each other up?

Cao Zhi alluded to the poem that brothers should not kill each other-they are born from the same root, so why bother to fry each other.