The PRC is the very definition of state capitalism. No great enterprise is undertaken without the direct consent of the government. Small business isn't a threat to state capitalism and thus is left to its own devices. Anything which threatens the monopoly of the state is destroyed. They only deploy the "jackboots" as a last resort.
Well I seriously doubt that any private company can just say build a freeway without government consent in the US either (i.e. all governments control what can and cannot be done by major companies).
If the Chinese government has been taking over mining operations can you please show the evidence of this (because major players that are owned and controlled by Americans aren't complaining about this)?