Chen studied mathematics at Tunghai University and began his career in journalism, serving as a writer for the Independence Daily Post for eight years, as well as editor of Formosa Magazine and Taiwan Social Research Quarterly.

[1][2] As a legislator, Chen jointly proposed an amendment to the Criminal Prosecution Law in October 2000, alongside Chiu Tai-san and Lee Ching-hsiung, regarding the use of search warrants.

[9][10] Chen Chung-hsin had planned to commemorate the National Day of the Republic of China in Hong Kong, but turned his visa application in late and was unable to participate.

[14] In April 2004, Chen Chung-hsin was considered a candidate to replace Tsai Ing-wen as head of the Mainland Affairs Council.

[16][17] After leaving public service, Chen has commented on aspects of Taiwanese identity,[18] Ma Ying-jeou's actions regarding Cross-Strait relations,[19] and Taiwan's place within the one China principle.