friend or foe? (quote from 沙家浜[Sha1 jia1 bang1]) (蔣|蒋[Jiang3] here refers to Chiang Kai-shek 蔣介石|蒋介石[Jiang3 Jie4 shi2] and 汪[Wang1] refers to Wang Jingwei 汪精衛|汪精卫[Wang1 Jing1 wei4])
to use an opponent's own methods to obtain retribution (idiom, from Song dynasty neo-Confucianist Zhu Xi 朱熹[Zhu1 Xi1]) / to get revenge by playing sb back at his own game; to give sb a taste of his own medicine
lit. not even the first stroke of the character 八[ba1] has been written (idiom) / fig. things have not even gotten started yet; nothing tangible has come of one's plans yet
to use an opponent's own methods to obtain retribution (idiom, from Song dynasty neo-Confucianist Zhu Xi 朱熹[Zhu1 Xi1]); to get revenge by playing sb back at his own game / to give sb a taste of his own medicine