What is the solution for totalitarianism? Destruction of the country, plunging millions into poverty, for it to be replaced by a sham democracy where all the levers of power are behind US interests? How did that work out in Iraq?
If you want China to stop being totalitarian, then you should wait until most Chinese citizens decide that they don't approve of the ruling party, and then let them decide what to replace it with. You cannot force democracy.