Yao Jia 姚賈 came from Wei 魏 and served the states of Zhao 趙 and Qin 秦. In Qin, he conspired with counsellor-in-chief, Li Si 李斯, against Han Fei 韓非 and manged to have him charged for high treason as a spy of Han 韓. In jail, Han Fei committed suicide.