That escalated quickly; Not long after the U.S. and China hoped to reach a new trade agreement, the U.S. made it significantly harder for American businesses to work with companies in China, with special emphasis placed on barring Huawei from doing business in the U.S.

U.S. President Donald Trump issued an executive order declaring a national emergency on May 15 ”to deal with the threat posed by the unrestricted acquisition or use in the United States of information and communications technology or services designed, developed, manufactured, or supplied by persons owned by, controlled by, or subject to the jurisdiction or direction of foreign adversaries.”

Källa: US Bans Huawei and Others Linked to ’Foreign Adversaries’