yeh was elected to the legislative yuan in 1992, and stepped down in 1995 upon leaving the democratic progressive party. subsequently, he was succeeded by . the next year, president lee teng-hui nominated yeh to the control yuan. in 1997, yeh helped hou you-yi and frank hsieh resolve the alexander family hostage crisis. yeh left the control yuan in 1999. he called for either president chen shui-bian or premier chang chun-hsiung to resign in january 2001, as the executive yuan had issued an order to end work on the longmen nuclear power plant without consulting the legislature. yeh ran as an independent in the legislative elections of 2001, and was defeated. yeh then invested in tsingtao beer. in march 2004, yeh faced lo chih-ming in debates about the cross-strait referendum to be held later that month. in october 2004, yeh was named to a committee convened to investigate the 3-19 shooting incident. after the judicial yuan ruled to reduce the committee's powers in december, yeh stated that "justice was interfering with the legislature." he was elected to the national assembly as a representative of the people first party in 2005, and subsequently granted a seat on the presidium of its fourth convocation. yeh later became a political commentator.