US President Donald Trump has lavished praise on Chinese leader Xi Jinping, a marked contrast to his previous criticism of China on the flashpoint issues of North Korea and trade.

But he also urged Mr Xi to "work very hard" on persuading North Korea to denuclearise.

On China's trade surplus, Mr Trump surprised many when he said he did "not blame China" for "taking advantage".

China has said it will lower market entry barriers to some sectors.