The thawing comes as the world’s two biggest economies agreed to a tariff truce, with the U.S. lowering its combined 145% levies on most Chinese imports to 30% for 90 days.

Boeing stock surged in pre-market trading Thursday, reaching $208.11—up 1.66%—as momentum builds from a historic aircraft order with Qatar and the lifting of a delivery ban by China. The aerospace giant’s shares closed Wednesday at $204.72, marking a new 52-week high.

The luxury jet, which was offered to the United States because of delays in Boeing's production of the new Air Force One fleet, will serve as a temporary method of transportation so that the current p...