以其人之道，还治其人之身 [ yǐ qí rén zhī dào，huán zhì qí rén zhī shēn ]
基本释义
以：拿；治：惩处。用别人的办法来惩治别人。
英文翻译
to give sb a taste of his own medicine; to use an opponent's own methods to obtain retribution (idiom, from Song dynasty neo-Confucianist Zhu Xi 朱熹); to get revenge by playing sb back at his own game