Secretary of State Mike Pompeo traded rebukes with China’s top diplomat during their public remarks in Beijing on Monday, on the last stop of his diplomatic tour of the region.

Pompeo met with Chinese Foreign Minister Wang Yi following meetings in North Korea over the weekend, where he hoped to set the table for a second summit between dictator Kim Jong Un and President Trump. If Pompeo hoped to enhance unity between the two sides regarding North Korea, his counterpart didn’t hesitate to air grievances regarding the broader U.S.-China relationship.