China has repeatedly found biohazards in imports of Australian timber, a foreign ministry spokesman says in response to a report that Beijing had halted shipments from Queensland.
The spokesman said China had asked Australian authorities to take "concrete measures" on the issue and hoped Australia would strengthen export controls.
He said China believed in healthy China-Australian relations and hoped Canberra would do more to help bilateral trust.
The spokesman also said that customs inspections of Australian shellfish that began last week complied with the law.
Tonnes of live Australian rock lobsters have been left on the tarmac at a Chinese airport due to customs clearance delays, with most Australian exporters stopping shipments in response.
Agriculture Minister David Littleproud warned the lobster issue could take some time to resolve and serious questions would be asked of Chinese officials.