As a member of the
Kuomintang, Chen served on the
Changhua County Council from 1982 to 1990. He was elected to two terms on the Legislative Yuan, before switching to the
People First Party in 2000. Soon after joining the party, Chen was named the chief executive of the PFP legislative caucus. Chen and other
Pan-Blue Coalition figures accused president
Chen Shui-bian of having an affair with
Hsiao Bi-khim in 2000. As a result, Chen Chao-jung was subsequently suspended. He criticized Taiwan's police force for failing to keep pornography out of the hands of minors in June 2000, and drew attention to increasing rates of identity theft in August, stating that perpetrators were using the stolen information to register for cell phones. He was active in reporting electoral fraud and
white-collar crimes, charges which involved the former aide of legislator
Tsai Ling-lan and the 2001 legislative campaign of
Charles Chiang.
Tuan Yi-kang accused an unnamed legislator of selling pirate media in 2001, and, in response Chen sued him for slander. Chen returned to the legislature in 2005, and rejoined the
Kuomintang the next year. During that year's
Double Ten Day festivities, Chen participated in a protest calling for the resignation of President Chen Shui-bian. In January 2007, Chen Chao-jung and
Chen Hsien-chung were involved in a physical altercation on the floor of the Legislative Yuan during a meeting of the Organic Laws and Statutes Committee. In 2016, Chen represented the People First Party in
Changhua County's 3rd legislative district. ==References==