Please be more specific. Regardless of whether there was a secondary motive of purging political opponents, are you saying that it was ineffective in actually addressing corruption? Can you show some data?
it's ineffective if you replace one corrupted opponent with corrupted friend, that's not anti-coruption campaign by my standards, that's just purging opponents, because you are not really improving things, makes almost as much sense as war on drugs
That's like asking for data on the levels of corruption in a mafia family. No one is allowed to gather such data, but it's pretty obvious that the corruption at higher levels approaches 100%.
That assertion rests on the assumption that the Chinese government is like a mafia family. That premise requires evidence. As I mentioned in another reply to you, I disagree with this premise and I gave my reasons why.
I even question the assertion that no one is allowed to gather data about the government's conduct or performance. The research "Sources of Authoritarian Responsiveness: A Field Experiment in China" [1] did exactly this.