ˊㄉㄧˋㄈㄤˋˇwúdì‑fàngshǐ

无的放矢
  1. 沒有箭靶射箭箭靶中心這裡箭靶)​。比喻言行沒有明確目標缺乏針對 到底針對什麼問題不要無的放矢亂放炮」。

to shoot without aim (idiom)​; fig. to speak without thinking, firing blindly, to shoot in the air, a shot in the dark