The Commercial Aircraft Corp. of China (Comac) corporate flags and the Chinese national flag fly outside the company’s headquarters in Shanghai, Monday, Jan. 18, 2021. The Trump administrations addition of Comac to a Defense Department list of companies with alleged Chinese military ties comes just days after a breakthrough in the state-backed jet manufacturers effort to win customers when an Indonesian airline agreed to buy its planes. Photographer: Qilai Shen/Bloomberg via Getty Images