This is not a very good example, because china is still "generations" behind the US in this field.
That is an example of an overtake that is happening now. China has just covered decades of lithography work in 2 years, literally from the beginning of the trade war to now, the Dutch as watching their lithography supremacy chipped away in real time. And the US has no lithography capability of its own; it's all ASML in Holland. The US is a cheerleader; it has no horse in this race. Your ignorance is rampant.
You said that china will prevail ,
I said it has prevailed, is prevailing, and will continue to prevail.
and i answered that it wont achieve that with only the c919. They will have to make much more than that.
And that is a completely different point from, "I doubt that china will ever make a civilian plane that is competitive in international markets, and that also includes the engine part." You don't see the difference between this sentence and "It won't achieve that with only the C919"? The difference is you moving the goalpost.
I dont understand what are you saying here.
Then improve your English because everyone else does and "I don't understand" is a pathetic escape from a defeated debate.
This no longer the world of the past. Things are not so simple nowadays.
What kind of empty retreat into nonsense is this? The world of the present and future will always hold powers exceeding other powers that were ahead of them before. There is no difference between now and the past in this regard. This concept is so universal that even if/when the human race dies out, alien civilizations across the galaxies will continue to surpass and be surpassed by each other.
Hard to believe that, taking into account that AFAIK, china still hasnt made a single civilian turbofan engine.
You need only to look at big pictures to see that. China started out behind the US/West in every regard but has overtaken in some (supercomputers, EV cars, quantum satellites, semiconductor design, etc...), overtaking in others (lithography), and have yet to overtake in many more, but the trend is that in all areas, China moves faster and those who can see the big image can see clearly China's threat. Those with small confined minds, can only say, "X hasn't happened yet, so it's hard to believe X will happen."