US Secretary of State Antony Blinken on Friday expressed strong concerns about China’s support for Russia’s defense industry and questioned Beijing’s sincerity in seeking peace in Ukraine.

He met Chinese Foreign Minister Wang Yi on the sidelines of the United Nations General Assembly in New York on Friday.

“When Beijing says that, on the one hand, that it wants peace, it wants to see an end to the conflict, but on the other hand is allowing its companies to take actions that are actually helping Putin continue the aggression, that doesn’t add up,” Blinken said at a media briefing.

Beijing said it has not supplied Russia with weapons for use in Ukraine.

Blinken, however, said China has provided about 70% of machine tools and 90% of microelectronics that Moscow needs for military production, including rockets and armored vehicles.