China’s state economic planner said that his country “indefinitely” suspended on Thursday all activity under a China-Australia Strategic Economic Dialogue, the latest setback for their strained relations.

“Recently, some Australian Commonwealth Government officials launched a series of measures to disrupt the normal exchanges and cooperation between China and Australia out of Cold War mindset and ideological discrimination,” China’s National Development and Reform Commission (NDRC) said in a statement on the decision.

The Australian dollar tumbled sharply on the news, and was as low as 0.7701 to the U.S. dollar from Wednesday’s $0.7747.

Bilateral relations were strained in 2018 when Australia became the first country to publicly ban Chinese tech giant Huawei from its 5G network. Relations worsened last year when Australia called for an independent investigation into the origins of the novel coronavirus, prompting trade reprisals from China.

In the 12 months to March, Australia exported A$149 billion worth of goods to China, excluding services, of which iron ore was by far the largest product.

Australia in April cancelled two deals struck by its state of Victoria with China on its flagship Belt and Road Initiative, prompting the Chinese embassy in Australia to warn that already tense bilateral ties were bound to worsen.

Australia’s federal parliament granted veto power over foreign deals by states in December amid the deepening diplomatic dispute with China, which has imposed a series of trade sanctions on Australian exports ranging from wine to coal.