ㄔㄨˇㄏㄜˊㄏㄢˋㄐㄧㄝˋchǔhé‑hànjiè

楚河汉界
  1. 紛爭鴻溝界河:)​。比喻敵對雙方界線 彼此溝通楚河漢界難以達成共識」。

  2. 象棋 卒子楚河漢界布局得宜便大有作為」。

lit. the river that divides Chu and Han, fig. a line that divides rival territories, the mid-line between sides on a Chinese chessboard