liǎng​xióng​bù​jù​lì

two great powers cannot coexist

两雄不俱立 兩雄不俱立 liǎng​xióng​bù​jù​lì
two great powers cannot coexist
two rivals or people of equal talent cannot exist at the same time without conflict; originally from the Records of the Grand Historian 史记 shǐ​jì, referring to the stalemate between Chu and Han, used to describe a situation where mutual suspicion or competition makes reconciliation impossible without one being eliminated