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Iowa Governor Terry Branstad (C) testifies before the U.S. Senate Foreign Relations Committee on a hearing considering him to be U.S. Ambassador to China on Capitol Hill in Washington D.C., the United States, on May 2, 2017. U.S. President Donald Trump's pick for Ambassador to China, Terry Branstad, said on Tuesday that if confirmed, he would work to "positively influence" the U.S.-China relationship. (Xinhua/Bao Dandan)