They have their own strategic needs to fill first. Ironically these are strategic needs brought about by Americans in the first place.

There is no way in which China is going to let American businesses destabilize China for a bit of money. China learned early, before the rest of the world did, how much damage the USA causes when they decide they don't like losing to their competition. The Chinese will sell their solar panels for currency once they have sufficiently isolated themselves from the whims of American hegemony and dishonest trade practices. By then the degenerative AI bubble will have popped, the US economy will have tanked, and nobody in the USA (up to and including its government) will have the money to afford Chinese solar panels.