ㄨㄟˊㄨㄟˋㄐㄧㄡˋㄓㄠˋwéiwèi‑jiùzhào

围魏救赵
  1. 史記孫子列傳記載戰國大軍圍攻國都求救軍師重兵在外空虛派兵直搗國都大梁被迫撤回途中遭到截擊大敗危機因此解除圍魏救趙襲擊敵人後方迫使撤回戰略 化解敵人攻勢指揮官決定圍魏救趙敵方總部發動奇襲」。

lit. to besiege 魏[Wei4] and rescue 趙[Zhao4] (idiom)​, fig. to relieve a besieged ally by attacking the home base of the besiegers
Wei belagern um Zhao zu retten. 2. Strategem