The U.S. will share closely held technology to allow South Korea to build a nuclear-powered submarine, President Donald Trump said ahead of a meeting with China’s leader Xi Jinping.

President Donald Trump and Chinese president Xi Jinping have begun what is expected to be three to four hours of high-stakes ,in-person talks in hopes of lowering the temperature of a simmering trade war that has threatened to boil over and upend the global economy.

By Laurie Chen BEIJING (Reuters) -As Air Force One took off from South Korea's Busan airport after U.S.-China talks on Thursday, Chinese leader Xi Jinping's Hongqi N701 limousine whisked him off to the Asia-Pacific Economic Cooperation summit some 50 miles (80km) away.

President Donald Trump said he had an “amazing” meeting with Chinese President Xi Jinping, where “a lot of decisions were made” on fentanyl, rare earth minerals and more.

The growing power of China's leader complicates U.S. dealmaking—and makes a grand bargain unlikely, writes Neil Thomas.

When President Trump meets with Chinese President Xi Jinping later Wednesday, he will be extending a hand to a leader that Washington and national security experts have identified as the biggest threat to American global dominance.

Chinese President Xi Jinping is expected to press the U.S. to shift its policy on Taiwan when he meets this week with President Donald Trump, who is pushing for a trade deal.