Hung is the 10th Legislator of Taiwan (R.O.C.), nominated by the Democratic Progressive Party (DPP). He has been a member of the Social Welfare and Environmental Hygiene Committee since the first session of his current term. Prior to joining the Legislative Yuan, Hung was the Deputy Secretary General of the Green Citizens’ Action Alliance. He worked with civil society and experts to advocate the country’s energy transition, environmental governance and climate change policy.