ㄧㄣˇˊㄅㄨˋㄈㄚyǐn’érbùfā

引而不发
  1. 開弓出去比喻善於啟發誘導比喻準備待機行事 老師課堂常常引而不發啟迪學生思考」、改革方案董事長引而不發遲遲公布」。

to pull the bow without shooting (idiom from Mencius)​; ready and waiting for action, to go through the motions, to practice, a trial run