Last October, the Biden administration published a sweeping set of export controls, including a measure to cut off China from certain semiconductor chips made anywhere in the world with U.S. tools, vastly expanding the reach of a bid to slow Beijing's technological and military advances.
TSMC, the world's largest contract chipmaker, said last year it had been granted a one-year authorisation by the United States that covered its factory in Nanjing, China, that makes less-advanced 28 nanometre chips.
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