Xi's U.S. counterpart, President Donald Trump, kept in place 145% tariffs on China, the world's second-largest economy.

Impeached South Korean leader Yoon Suk Yeol is due to attend the first hearing on Monday of his criminal trial to face charges that he led an insurrection when he declared martial law late last year and plunged the country into months of turmoil.

Imposition of new tariffs on nearly every country adds to concerns in Europe and Asia about relying on America.

Trump announced a 90-day pause on a host of global tariffs he had planned, but increased levies on Chinese imports to 145%. "We urge the US to take a big step to correct its mistakes, completely cancel the wrong practice of 'reciprocal tariffs' and return to the right path of mutual respect,

China said it is now retaliating, adding 125% percent tariffs to U.S. goods, with the surcharge going into effect overnight.