Jilted mistresses have become key weapon in exposing graft . Fighting corruption a key policy of Chinese President Xi Jinping . Score: 6 Party fixes its focus on petty officialdom , banning lavish banquets and gifts .
Jilted mistresses have become key weapon in exposing graft . Fighting corruption a key policy of Chinese President Xi Jinping . Campaign has not been effective , with few high-profile targets . Party fixes its focus on petty officialdom , banning lavish banquets and gifts .