That isn’t true though. All presidents launch anti corruption campaigns to solidify their power when they start. Xi did it, Hu did it, Jiang did it, I bet Deng did it (although the office was merged yet, he was at least supreme leader). When they are all corrupt, it is easy to (a) clean house of people you don’t like (b) protect and promote your supporters and (c) scare lots of monkeys by killing lots of chickens.

The CPC always admitted there was corruption, to do otherwise would simply lose credibility with people. Given that Xi is now president for life, the corruption should simply be accumulating now since the 10 year house cleaning cycle has been broken.