US President Donald Trump will meet North Korean leader Kim Jong-un in Singapore on 12 June.

China, Japan and South Korea agreed to cooperate in seeking the denuclearisation of the Korean peninsula.

Trump spoke with Chinese President on Wednesday, with the two reiterating commitment to existing sanctions on North Korea even as a trade war brews between the two countries.

North Korean leader Kim Jong Un visited China and met President Xi Jinping, state media of both countries said on Tuesday, their second encounter in two months in a flurry of diplomatic engagement that has eased tensions on the Korean peninsula.

U.S. Secretary of State Mike Pompeo arrived in Pyongyang on Wednesday to prepare an unprecedented summit between North Korean leader Kim Jong Un and Donald Trump, while the U.S. president signaled the possibility that three Americans detained in the country could soon be released.

Trump on Tuesday pulled the United States out of an international nuclear deal with Iran, raising the risk of conflict in the Middle East, upsetting European allies and casting uncertainty over global oil supplies.

Liu He visit renews cautious optimism of resolution to trade impasse

It's a tough time in the U.S.-China relationship. We must avoid a trade war, former U.S. Ambassador to China Locke said.

China's top diplomat discusses China's "dual-track" proposal to facilitate the tension on the Korean Peninsula.

Americans also seek halt to Chinese government support for advanced technologies.