U.S. President Donald Trump stands Chinese Vice Premier Liu He after signing "phase one" of the U.S.-China trade agreement in the East Room of the White House in Washington, U.S., January 15, 2020.
Chinese Vice Premier Liu He and U.S. President Donald Trump sign "phase one" of the U.S.-China trade agreement during a ceremony in the East Room of the White House in Washington, U.S., January 15, 2020.
Acting White House Chief of Staff Mick Mulvaney talks with U.S. Rep. Mark Meadows (R-NC) and House Minority Leader Kevin McCarthy (R-CA) prior to a U.S.-China trade signing ceremony in the East Room of the White House in Washington, U.S., January 15, 2020.
U.S. President Donald Trump shakes hands with Chinese Vice Premier Liu He during a signing ceremony for "phase one" of the U.S.-China trade agreement in the East Room of the White House in Washington, U.S., January 15, 2020.
Chinese Vice Premier Liu He and U.S. President Donald Trump shake hands after signing "phase one" of the U.S.-China trade agreement during a ceremony in the East Room of the White House in Washington, U.S., January 15, 2020.
U.S. President Donald Trump speaks prior to signing "phase one" of the U.S.-China trade agreement with China's Vice Premier Liu He in the East Room of the White House in Washington, U.S., January 15, 2020.
U.S. President Donald Trump speaks prior to signing "phase one" of the U.S.-China trade agreement in the East Room of the White House in Washington, U.S., January 15, 2020.
U.S. President Donald Trump stands with Treasury Secretary Steven Mnuchin prior to signing "phase one" of the U.S.-China trade agreement in the East Room of the White House in Washington, U.S., January 15, 2020.
U.S. President Donald Trump stands with Chinese Vice Premier Liu He in the East Room of the White House at the start of a signing ceremony for "phase one" of the U.S.-China trade agreement in Washington, U.S., January 15, 2020.
Chinese Vice Premier Liu He applauds U.S. President Donald Trump as he speaks at the start of a signing ceremony for "phase one" of the U.S.-China trade agreement in the East Room of the White House in Washington, U.S., January 15, 2020.
U.S. President Donald Trump speaks flanked by Chinese Vice Premier Liu He and U.S. Vice President Mike Pence at the start of a signing ceremony for "phase one" of the U.S.-China trade agreement in the East Room of the White House in Washington, U.S., January 15, 2020.
White House economic advisor Larry Kudlow laughs with senior advisor Jared Kushner as they arrive at the East Room with senior advisor Ivanka Trump for a signing ceremony of "phase one" of the U.S.-China trade agreement with U.S. President Donald Trump and Chinese Vice Premier Liu He in the East Room of the White House in Washington, U.S., January 15, 2020.
White House National Security Advisor Robert O'Brien speaks with senior advisor Jared Kushner as they wait in the White House East Room with senior advisor Ivanka Trump, Agriculture Secretary Sonny Perdue and Commerce Secretary Wilbur Ross for the start of a signing ceremony of "phase one" of the U.S.-China trade agreement between U.S. President Donald Trump and Chinese Vice Premier Liu He at the White House in Washington, U.S., January 15, 2020.
U.S. President Donald Trump arrives with Chinese Vice Premier Liu He at the East Room of the White House for the start of a signing ceremony of "phase one" of the U.S.-China trade agreement between the United States and China in Washington, U.S., January 15, 2020.
U.S. Trade Representative Robert Lighthizer attends the U.S.-China trade agreement signing ceremony in the East Room of the White House in Washington, U.S., January 15, 2020.
Chinese Vice Premier Liu He reaches out to U.S. President Donald Trump as he approaches the podium to speak during a signing ceremony for "phase one" of the U.S.-China trade agreement in the East Room of the White House in Washington, U.S., January 15, 2020.
Chinese Vice Premier Liu He (L) reaches out to U.S. President Donald Trump (R) as he approaches the podium to speak during a signing ceremony for "phase one" of the U.S.-China trade agreement in the East Room of the White House in Washington, U.S., January 15, 2020.
New Boeing CEO Dave Calhoun stands after being acknowledged by U.S. President Donald Trump during a U.S.-China trade signing ceremony in the East Room of the White House in Washington, U.S., January 15, 2020. White House senior advisors Ivanka Trump and Jared Kushner look on at left.
FILE PHOTO: U.S. Trade Representative Robert Lighthizer (R) talks to China's Vice Premier Liu He during a meeting with U.S. President Donald Trump in the Oval Office at the White House after two days of trade negotiations in Washington, U.S., October 11, 2019.