He held the position with Cho Jung - tai until 2009 .
After the DPP chairmanship election in May 2008 , chairwoman - elect Tsai Ing - wen announced the appointment of Chen as the deputy secretary - general of the party .
Chen held the position with Cho Jung - tai until 2009 .
After the DPP chairmanship election in May 2008 , chairwoman - elect Tsai Ing - wen announced the appointment of Chen as the deputy secretary - general of the party .