SINGAPORE — China is Australia’s largest trading partner and a top export destination. Australia is one of the few developed nations on Earth that exports more into China than it imports from China. ..The relationship between the two countries has deteriorated since Australia supported a call for an international inquiry into China’s handling of the coronavirus. …China has taken several measures this year that impede Australian imports. …China has banned timber imports from the Australian states of Queensland, Victoria, and more recently, South Australia and Tasmania. “The Chinese customs has since January detected many cases of live pests in timber imported from Australia, such as longicorn and buprestid beetles. These live pests, if allowed into China, will gravely endanger China’s forestry production and ecological security,” Chinese foreign ministry spokesperson Wang Wenbin said following reports of the ban on Queensland log exports.