Conversation so far:
when did Xi Jinping join the politburo standing committee?
in October 2007.
what was Xi Jinping role in the politburo standing committee?
Xi Jinping is the general secretary.
what were Xi Jinping's contributions as general secretary of the politburo standing comittee?
Xi Jinping vowed to crack down on corruption.

Question: was he successful?
Self-contained rewrite: was Xi Jinping succesful in his nationwide anti-corruption campaign?