The approvals mark a major reversal after April’s sweeping restrictions, imposed by the Trump administration, barred companies from selling certain advanced semiconductors to China. Those rules left Nvidia facing a $4.5 billion inventory write-down, as it had no alternative buyers for its H20 chips.

Nvidia Corp.’s Jensen Huang spent months telling everyone what a grave mistake the US was making restricting shipments of artificial intelligence processors to China — with little sign that his argument was swaying anyone.