Rex Tillerson on Wednesday denounced China’s “empty promises” on North Korea and said he would consider action to “compel” China to comply with the United Nations sanctions in case of violations.

Tillerson, U.S. President-elect Donald Trump’s nominee for Secretary of State, pointed to North Korea as an adversary which posed “grave threats to the world because of their refusal to conform to international norms.”

Speaking at a nine-hour confirmation hearing at the U.S. Senate Foreign Affairs Committee, Tillerson attacked China’s attitude toward the DPRK and said the U.S. wouldn’t ignore “violation of international accords”.

“We cannot continue to accept empty