 A member of the Democratic Progressive Party ( DPP ) , Chen was elected legislator three times serving from 1996 to 2004 . During his term , he became the secretary @-@ general of the Justice Alliance faction of the DPP in 1998 and the legislative caucus leader in 1999 . He also became members of various committees within the Legislative Yuan , including the Foreign Affairs , Judiciary , National Defense , and Transportation Committees . 
