China’s ruling elite has stability and term limits.
The Communist Party is reverting to Confucian ideals. But to achieve them, the party must purge corruption from the body politic.
Without it, the PRC is living on borrowed time.
The PRC cannot purge corruption. Corruption is the fringe benefit that motivates minor Party officials to want to be Party officials and strive to go higher in the Party.
It's what brought down the USSR. You need some incentive to get people to strive. With the free market, it's the chance to make a lot of money by coming out with a superior product or service. With Communism or Third World oligarchies (or American politics), it's the chance to get in on some good graft.