U.S. President Donald Trump and Chinese Vice Premier Liu He, who is also a member of the Political Bureau of the Communist Party of China Central Committee and chief of the Chinese side of the China-U.S. comprehensive economic dialogue, show the signed China-U.S. phase-one economic and trade agreement during a ceremony at the East Room of the White House in Washington D.C., the United States, Jan. 15, 2020. (Xinhua/Wang Ying)

WASHINGTON, Jan. 15 (Xinhua) -- China and the United States formally signed their phase-one economic and trade agreement here on Wednesday, with Chinese Vice Premier Liu He and U.S. President Donald Trump inking the papers in the White House.