US treasury secretary appeals to China for co-operation on climate change

Treasury Secretary Janet Yellen, left, speaks as Chinese vice premier He Lifeng, right, listens during a meeting in Beijing (Mark Schiefelbein/AP)

US treasury secretary Janet Yellen has appealed to China for cooperation on climate change and other global challenges and not to let disagreements about trade and other matters derail relations.

In a meeting with her Chinese counterpart, Vice Premier He Lifeng, Ms Yellen defended US restrictions on technology exports that upset Beijing.