Marxism is a European idea which purports to identify a universal law of history. The CCP pretends to believe it, but in reality, it has no use for universal laws of anything. Its real ideology is Chinese exceptionalism. As a result, the Chinese leadership is only responsive to arguments based on national self-interest.
How can this work in practice? Take the Uighur issue. There is no point in framing an argument based on universal human rights when the Chinese don’t even accept that concept. What you can say, however, is that public opinion throughout the world is outraged by the Uighur camps, and that Americans in particular fear the prospect of being sent to similar camps if China ever becomes the predominant power in the world. China’s rise will thus be imperiled by international opposition if it continues to oppress its own people in such an outrageously blatant way. Is the short term benefit worth the long term risk?