With travel warnings and revoked visas, the two superpowers locked in a bruising trade war may make students and tourists their bargaining chips.

Shares of Boeing fell Tuesday following a report that China has halted the delivery of all its jets to airlines in the country as part of the escalating trade war.

China reportedly asked its airlines to halt Boeing orders, which has put the aircraft manufacturer in the middle of the U.S.’s trade war with China. Boeing, a major U.S. company, relies heavily on international orders,

China appointed a new trade negotiator Wednesday in the midst of its tariff fight with the U.S. The government said Li Chenggang replaces Wang Shouwen, who participated in negotiations for the 2020 trade deal between the China and the U.