Hours of talk, but little change after Biden-Xi virtual meeting

US President Joe Biden and Chinese leader Xi Jinping just completed their longest exchange as world leaders - but three and a half hours of talks appear to have done little, if anything, to narrow divergent positions between the superpowers.

China's state media described the meeting as "frank, constructive, substantive and fruitful".

A senior US official said the talks, held by video conference, went on...