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
  1. 以:拿；治:惩处。用别人的办法来惩治别人。
英文翻译
  1. to give sb a taste of his own medicine
  2. to use an opponent's own methods to obtain retribution (idiom, from Song dynasty neo-Confucianist Zhu Xi 朱熹)
  3. to get revenge by playing sb back at his own game