US treasury secretary lands in Beijing in visit aimed at calming tensions

Janet Yellen expected to emphasise need for cooperation between two superpowers to tackle global threats

The US treasury secretary, Janet Yellen, has arrived in Beijing on a four-day trip that aims to tame spiralling tensions between the world's two largest economies, particularly over trade and the hi-tech chip industry.

She will meet senior Chinese officials including the premier, Li Qiang, and former vice-premier and economics tsar Liu He, who is seen as close to China's president, Xi Jinping, in her first day of talks on Friday.