What is the idiom that a chessboard separates the Chu River from the Han Dynasty?

Extreme opposition

Spelling: shbüLiüng lü

Interpretation: two stand together. Refers to the fact that hostile parties cannot exist at the same time. Metaphor is irreconcilable contradiction.

Out: "Warring States Policy Chu Ce": "Chu is stronger than Qin; If Chu is weak, Qin Qiang; This is awkward. "

Example: In this dispute, the two sides have been deadlocked until now.