Straits Exchange Foundation
Chang was appointed as the chairman of the Straits Exchange Foundation in 2005 after the death of the former chairman Koo Chen-fu. With the resignation of Su Tseng-chang as Premier on May 12, 2007, President Chen Shui-bian nominated Chang to fill the post of Premier a second time effective May 21, and Hung Chi-chang succeeded Chang as the chairman of the Straits Exchange Foundation. Su's resignation and Chang's second appointment as Premier marked the sixth premier that Chen Shui-bian has appointed during his two terms as President.