Xinhua reported that the so far nine people have pleaded guilty to charges related to Chen allegedly embezzling $3.15 million in public funds and accepting bribes of about $9 million in a land purchase deal.
Chen has been detained in a Taipei jail since Nov. 12. He was first indicted Dec. 12 for money laundering and bribery while in office.
Three relatives of Chen, including son Chen Chih-chung, daughter-in-law Huang Jui-ching and brother-in-law Wu Chin-mao, told a court on Jan. 21 that they had laundered money.
Chen's wife Wu is scheduled to appear in court Feb. 10, the news service reported.
Couple mistakenly served bag of cash at McDonald's drive-thru
Benedict Cumberbatch's dramatic reading of R. Kelly lyrics is just what you need