China pushes for 70% homegrown silicon wafer use as domestic firm ramps up 12-inch production — government seeking to localize critical chip supply chain amid AI boom and export restrictions
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RetroFed
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The sand that Taiwan uses to make it’s silicon wafers mostly comes from China
AFAIK it’s actually almost all from one district in US- https://en.wikipedia.org/wiki/Spruce_Pine_Mining_District