相持不下

xiāngchíbùxià
  1. at a stalemate
  2. deadlocked
  3. in unrelenting mutual opposition

CEDICT

to be locked in a stalemate; neither side is winning or yielding in a standoff

Wiktionary

彼此對峙，不肯退讓或勝負未決。

重編國語辭典

Entry Composition

1 相持 xiāngchí
  1. locked in a stalemate
  2. to confront one another
2 不下 bùxià to be not less than (a certain quantity, amount etc)