https://phys.org/news/2018-06-boeing-impact-us-china-tariffs.html

The comments came in response to news that President Donald Trump would impose 25 percent tariffs on tens of billions in Chinese imports, sparking immediate retaliation from Beijing.

Boeing garnered about 12.8 percent of its 2017 revenues from China and is frequently seen as among the more vulnerable US multinationals to an all-out trade war.