I remember someone on here talking about this and they linked a couple of videos from a YouTube channel called Asianometry or something that explained the technology.
I can't remember which videos they are though but if I recall, the reason for particle collider wafer manufacturing not being mainstream was because of requiring large infrastructure investment per factory.
It makes sense that China would pursue this as there isn't as strong a push on profit motive as in somewhere like Taiwan or S. Korea.
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