 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 . He held the position with Cho Jung @-@ tai until 2009 . Chen is now concurrently serving as both the spokesperson of the Democratic Progressive Party and the chief executive officer of the party 's Policy Research and Coordinating Committee since May 2011 . 
