China’s President Xi Jinping has called for a “peaceful” resolution to tensions over North Korea, in a phone conversation with US President Donald Trump, Chinese state media said.
On Tuesday Mr Trump tweeted that the US was not afraid of acting alone on North Korea if China would not help.
Tensions have risen on the Korean peninsula after the dispatch of US warships to the region.
North Korea reacted with anger, saying it would defend itself “powerfully”.
Mr Xi and Mr Trump had met in person just last weekend at a summit in Florida where they discussed North Korea.
Their phone call took place on Wednesday morning, according to Chinese state broadcaster CCTV. The White House has not released any details.
During the conversation, Mr Xi said China “is committed to the target of denuclearisation on the peninsula, safeguarding peace and stability on the peninsula, and advocates resolving problems through peaceful means,” CCTV said.