When China was developing C919/C929 I was pretty sure given its track record the US would slap sanctions and I was also certain that China already knows that and will be working on a domestic solution.
Irrelevant, if the US is sitting idle or not the bottom line is China made it... It does not need anything from the west case in point post#46. and plenty more.
Quantum communication, Homegrown supercomputer with homegrown technology that beat the US in the top 10, and the list goes on and on but what's the point. China will remain behind for eternity on Twitter and PDF ofcourse.