http://abcnews.go.com/blogs/headlines/2012/09/where-in-the-world-is-chinas-xi-jingping/
Willy Lam, a Chinese scholar at the Chinese University of Hong Kong who told ABC News that he has spoken with more than one Chinese government official in Beijing, says that Xi was hospitalized after Sept. 1 for an undisclosed illness that left him with what officials describe to Lam as a “contortion” on his face. For this reason officials do not want him to appear in public.
Xi is making good progress and the mystery illness is not expected to affect his participation in the transition of power. Xi is not known, Lam says, to be in the best of health but the event is proving to be embarrassing for the Chinese government which still considers the health of its leaders to be a state secret.