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.
The idea is that if Chinese citizens are going to want democracy, they will have to take it. There is no way anyone else can give it to them. Least of any the US, and possibly the worst way to get a Marxist-Leninist state (this time, four times the size of the USSR!) to relinquish power is to create economic isolation in the midst of an upcoming crisis of capitalism as we have already cut off a sizeable chunk of the world.
In any case, you can rest assured that if the Chinese have to choose between Yeltsin and the CCP, they will choose the latter 100% of the times. Democracy cannot be forced.
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.