He served in the Republic of China Air Force from 1967 to 2006, retiring with the rank of General before assuming the post of Minister of National Defense in 2016.

[7] Speaking at the Foreign and National Defense Committee of the Legislative Yuan on 23 May 2016, Feng said that he would not support the Taiwan independence movement.

[8][9] At 8:15 a.m. on 1 July, a Hsiung Feng III missile was inadvertently launched from a corvette docked at Zuoying Military Harbor.

[10] The strike hit the Taiwanese fishing boat Hsiang Li Sheng, killing the captain and injuring three of his crew.

[16][17] On 5 August 2019, Yeh took office as minister of the Veterans Affairs Council,[18] succeeding Chiu Kuo-cheng, who had been named director-general of the National Security Bureau.