U.S. Trade Representative Robert Lighthizer (from left), U.S. Treasury Secretary Steven Mnuchin and Chinese Vice Premier Liu He gather for a meeting in Beijing on May 1. They are due to meet again in Shanghai this week.

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U.S. Trade Representative Robert Lighthizer (from left),  U.S. Treasury Secretary Steven Mnuchin and Chinese Vice Premier Liu He gather for a meeting in Beijing on May 1. They are due to meet again in Shanghai this we