Federal authorities in the United States have halted imports of Bitmain's newest Antminer mining equipment, causing disruptions to Wall Street Bitcoin miners' operations. The U.S. Customs and Border Protection (CBP) detained shipments of Bitmain's Antminer S21 and T21 series at various ports, reportedly at the request of the Federal Communications Commission (FCC). The detention appears selective, targeting only Bitmain's models while allowing competitors' hardware to enter normally. Around 200 units are estimated to be held at ports, with some shipments detained for over two months. The crackdown may be linked to concerns about Chinese technology components, including the use of chips from Sophgo, a semiconductor firm under scrutiny for alleged sanctions violations. Mining companies are facing mounting storage fees and seeking clarity from regulatory authorities. Despite the disruptions, Wall Street Bitcoin miners continue to expand their mining fleets and increase mining rates in response to declining profitability.



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