The United States banned China from flying to the ISSthere are a lot more than just engines, i think if the US does go that route C919 will be dead for a few years at least.
"Hehe, here is the Chinese space industry and will die.
China has built its own station, and is also the second country in terms of the number of launches into space.
The United States has banned and banned China for access to chips and equipment
China develops and manufactures its equipment
"We are here"
The United States has banned the sale of engines to China.
China will develop its own engines.
As we can see from history, how many times have Chinese companies been predicted to die, but in the end, Western policy shoots itself in the knees.