ㄅㄧˇㄔㄤˋchàngˇㄏㄜˋ

  1. 彼此互相呼應東周列國·》:了卻然後謁見內外同心彼唱此和不由不從。」彼倡此和」。

to chorus sb else's lead (idiom)​; to chime in in agreement