Commerce secretary Howard Lutnick said the US’s reversal of restrictions on sales of chips to China followed recent trade negotiations with Beijing over rare earths. President Donald Trump curbed exports of Nvidia’s H2O artificial intelligence chips to China in April as part of an escalation of his trade war with Beijing.

The head of a House of Representatives panel on China told U.S. Commerce Secretary Howard Lutnick that resuming sales of Nvidia's H20 chips to China threatens to advance Beijing's AI capability, stepping up his criticism of the decision and saying the original ban was "the right call.