FILE - In this May 4, 2012 file photo, Chinese President Hu Jintao, front, and Vice President Xi Jinping, back, arrive at a conference to celebrate the 90th anniversary of the founding of Chinese Communist Youth League at the Great Hall of the People in Beijing, China. The scandal surrounding disgraced politician Bo Xilai had loomed over the party for a half-year, triggering infighting and complicating preparations for the fall leadership congress at which President Hu Jintao will step down as party boss in favor of Vice President Xi Jinping. (AP Photo/Alexander F. Yuan, File)
