Days after a letter from President Donald Trump reached Iran’s supreme leader, giving him a choice between negotiating a deal to end Iran’s nuclear program or U.S. military action to destroy it, the two sides remain far apart on the conditions that would allow such a conversation,

China, Iran and Russia called for diplomacy over “pressure and threats” and an end to “all illegal unilateral sanctions” following talks on Tehran’s nuclear program Friday in Beijing, Chinese state media said.

Representatives of China, Russia and Iran have called for an end to U.S. sanctions on Iran over its rapidly advancing nuclear program and a restart to multinational talks on the issue.