zuò​guān​chéng​bài

fence-sit

坐观成败 (坐觀成敗) zuò​guān​chéng​bài
fence-sit
to wait for the outcome of a conflict or fight before committing to a side; to remain neutral for opportunistic reasons
wait and see
to sit and await success or failure without intervening; to take a passive observation approach

Frequency

Written text
0.014 per million

Sources

Definitions
CC-CEDICT
Frequency data
BCC Corpus (BLCU)