US President Joe Biden's top Pacific envoy on Wednesday accused China of trying to "drive Australia to its knees" through a barrage of sanctions that amounted to "economic warfare".
In remarks to the Sydney-based Lowy Institute, veteran diplomat Kurt Campbell lampooned Beijing for strong-arm tactics.
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Painting China as increasingly bellicose and determined to impose its will overseas, Campbell said Beijing had engaged in "really dramatic economic warfare -- directed against Australia".
Over the last two years, China has introduced a raft of punitive sanctions on Australian goods in a fierce political dispute that has frozen ministerial contacts and plunged relations into the most serious crisis since the Tiananmen Square crackdown in 1989.
"China's preference would have been to break Australia. To drive Australia to its knees," said Campbell, who currently serves as the White House Indo-Pacific coordinator.
China has been angered at Australia's willingness to legislate against overseas influence operations, to bar Huawei from 5G contracts and to call for an independent investigation into the origins of the coronavirus pandemic.
Australian barley, coal, copper ores, cotton, hay, logs, rock lobsters, sugar, wine, beef, citrus fruit, grains, table grapes, dairy products and infant formula have all been subject to Chinese sanctions.
The US envoy said that under President Xi Jinping, China has become "more risk acceptant, more assertive, more determined to basically take steps that other countries would view as coercive".
The Biden administration has embraced a policy of "strategic competition" with China -- acknowledging rivalry between the two powers but maintaining ties so conflicts do not spiral out of hand.
Beijing repudiated the comments on Wednesday, claiming Australian politicians had "played up the China threat theory, accused and attacked China for no reason, provoked tension and created confrontation".
"We hope the relevant people on the US side will not confuse right and wrong," foreign ministry spokesman Wang Wenbin said at a regular press conference.
Biden recently shocked many in the region by agreeing to share sensitive nuclear-powered submarine technology with Canberra, allowing Australia to dramatically increase its military deterrence.
Campbell indicated the move -- part of a broader three-way AUKUS agreement that includes Britain -- would bind the three allies for generations.