Everytime the issue of Chinese state subsidies comes up, two things occur to me.
First, a "subsidy" is just govt tax money. In other words it comes from somewhere. It is, in effect, the Chinese people, contributing to the creation, or development of an industry. Clearly the Chinese govt thinks this is a sound commercial strategy, and certainly from here (considering their global dominance in manufacturing) it appears to be working.
Secondly, it's not like all countries don't subsidize industries of their own. Although their decisions of what to subsidy varys a lot.
For example the US subsidizes weapons production. To the tune of a trillion $ a year. That spills over a bit into commercial stuff (Boeing for example.) And sure, there is some export value (although that may decline in the long term given current political isolationism.)
Of course you can't spend a trillion a year if the storehouse is full. It's necessary to expend some munitions from time to time to make room for new ones. But I digress.
To go back, when people complain that US products are expensive because of Chinese (or other) subsidies- just be aware that the US subsidizes more than most. They just target industries that have little to no economic value to US citizens, and which can't be purchased by domestic or indeed foreign citizens.
The US could easily subsidize electric cars, or solar, or wind manufacturing but it chooses to subsidize airplanes and naval ships and tank builders instead. It chooses to spend money on 2 million employees (armed forces) rather than on 2 million factory workers, or day-care facilitators, or health-care workers.