ㄔㄤˋㄉㄨㄟˋㄊㄞˊㄒㄧˋchàngduìtáixì

唱对台戏
  1. 戲班同時演出比喻採取對方相對競爭行動相反意見故意作對 當紅影星同時有戲推出唱對臺戲味道」、商場競相降價唱對臺戲」、主持人唱對臺戲反對意見」。

to put on a rival show (idiom)​; to set oneself up against sb, to get into confrontation