This week China has added to its export restrictions to the United States, with the export of the critical minerals gallium, germanium and antimony cut to its trade war sparring partner.

This follows broader moves to restrict antimony exports back in September and gallium, germanium and graphite over a year ago, with China citing national security concerns amid rising trade tensions and President-elect Donald Trump due to take office next month.

It came after the outgoing Biden Administration issued controls on computer chip exports.