China had lifted import bans on pork products from the United States, Canada and Mexico, the country's top quarantine authorities said Tuesday.

The bans were lifted on the basis of risk assessment, the General Administration of Quality Supervision, Inspection and Quarantine said in a statement on its website.

In April and May, China imposed bans on pigs and pork imports from Mexico, Canada's Alberta Province and some regions of the United States, as an emergency response to the A/H1N1 flu.