Earlier quoted context omitted.
China is a country lead by engineers with unlimited power to do whatever they want. If they want all cars to be electric, that will happen. If they want a 5 million person city just there because it's logistically advantageous, then that will happen. The good thing is that they can make decisions like this. The bad thing is that they can make decisions like this.
Autocracies seem to be the most efficient form of governance. It's a shame that this also means that they can do evil things very efficiently, given no one can stop them.
Modern China, so far, has only really experienced a fairly homogeneous historical phase, which is one primarily driven by economic growth. They haven't been forced to deal with major societal issues, in my opinion it's simply too early to judge just how robust that government and state is going to be in the long-run.