I believe it comes down to a difference in philosophy, the Chinese government is comfortable choosing “winning” companies and funding them, scaling them immediately to compete on the global market. It’s part of their “Industrial Policy” approach. Western countries (including countries under their influence) widely refuse to support individual companies (with some exceptions) and let the market decide as they say. Both approaches come with their own inefficiency and risk.
And yes the long term vision is to break the markets. Subsidize and come in cheap, get everyone used to the new floor prices, outlast the competition, and raise the floor once they control it.
Edit - when Romney called China the US #1 geopolitical trade adversary, this is the kind of behavior he was talking about.