US-China chip war: America is winning

Silicon production is almost all for solar panels now where quality doesn't matter much (not nearly as it does for chips) and price rules. For chip-grade silicon, it's a lot easier and it can be made anywhere and price doesn't matter at all.

Rare earths production concentrated in China simply because they don't care about environment. If there's a trade war, regulations will be softened in the rich world too, plus with embargo to ensure competitiveness, production can go in the rich world as well, there are plenty of rare earths deposits in many countries.