A combination of file photos showing Chinese President Xi Jinping (L) in London's Heathrow Airport, October 19, 2015 and (R) U.S. President Donald Trump listening to questions from reporters in New York, U.S., January 9, 2017.

A combination of file photos showing Chinese President Xi Jinping (L) in London's Heathrow Airport, October 19, 2015 and (R) U.S. President Donald Trump listening to questions from reporters in New York, U.S., January 9, 2017. 

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