South Korea and China signed seven memorandums of understanding (MOUs) on Saturday, including currency swaps and joint responses to online scams, to broaden cooperation in practical areas, the presidential office said.

It needs the United States for defense and has spent billions building factories in America. But a Trump trade deal this week with China could erase a Korean edge in the U.S. market.

Trump called a pending trade deal with South Korea 'pretty much finalized' after months of deadlock over details of investment in the US.

China’s President Xi Jinping will meet his new South Korean counterpart Lee Jae Myung as both leaders work to rebuild ties between their two countries, after years of Seoul moving closer to the US.

Trump and Xi have left the site of the meeting in Busan. Trump just boarded Air Force One to head back to Washington, waving and pumping his fist. Xi is continuing on to Gyeongju to attend the Asia-Pacific Economic Cooperation summit.

Donald Trump has said he has given South Korea permission to build nuclear-powered submarines in Philadelphia, in an announcement that could rattle China as the US president prepares to meet Xi Jinping.

U.S. President Donald Trump is meeting with Chinese President Xi Jinping in South Korea on Wednesday (Thursday morning local time).

A preliminary tariff deal with President Trump called for a large investment in the United States, while China has warned Seoul not to side with Washington.