楚河漢界 [ㄔㄨˇ ㄏㄜˊ ㄏㄢˋ ㄐㄧㄝˋ; chu3 he2 han4 jie4] lit. the river that divides Chu and Han fig. a line that divides rival territories the mid-line between sides on a Chinese chessboard ◄ ►