Cut the gourd in half with a knife and guess the northeast idiom.

break up a friendship

Jin Yi made a decisive decision.

Anti-sense, slow down.

Unscramble a knife and cut it in two. Metaphor resolutely cut off relations.

Source Songshi Puji's "Five Lantern Festival Yuan" Volume 12: "One knife and two sections, not a master." "Zhu lei" Volume 44: "It can be seen that those who deny themselves make a clean break from the roots, and then cut off and no longer sprout."