Cheng Wei-yuan (Chinese: 鄭為元; pinyin: Zhèng Wèiyuán; 20 January 1913 – 3 August 1993) was a Taiwanese politician. He was the only Minister of National Defense (1987-1989) with the complete personal achievements in all the 4 power systems (Kuomintang, Politics, Military and Intelligence) in the ROC history. Being one of the few top-rank KMT generals sympathizing the victims by the Martial Law operation during White Terror and supporting the democratic modernization trend of the state; he kept the open-mind policy of communication to cooperate with the demands of parliament, media and societies, including the subtle relation with the newly founded Democratic Progressive Party.