Odaily Planet Daily News According to market news, The Mining Pod blog program disclosed that the U.S. Customs and Border Protection (CBP) is detaining certain imported Bitmain Antminer mining machines at U.S. entry points, involving equipment from Bitmain's Antminer S21 and T21 series, which are Bitmain's latest ASIC mining machine series. Sources said that the FCC and CBP have not targeted other ASIC manufacturers such as MicroBT or Canaan. In addition to revealing that the FCC requested a freeze, U.S. Customs and Border Protection did not provide affected parties with specific reasons for taking this action, nor did it indicate how long the goods would be detained.