Not sure why this is downvoted. The Chinese government has been quite transparent in terms of globally dominating several industries including EV through heavy government support.
It would make no sense to destroy your own industry because it can’t compete with a heavily subsidized foreign industry.
If it is such a successful strategy, why doesn't everybody do it?
Subsidise industries?
Everyone does.
China funds it upfront, while the US does it after the spending and calls it a bail-out, or a "government contract"
It's often not a successful strategy.
If your product sells like made at a subsidized price, but not at the unsubsidized price, it's not a real business.