If it happens in 5 years what will ASML do then ? The west’s monopoly on this sector would be finished.
At this point China has no choice but to develop the tech or be forced to not have processors. Time will tell.
Given that hard power is being used to punish China they will use every means at their disposal from massive investments and manpower to poaching talents and even espionage.
If North Korea can make nukes then this shouldn’t be impossible for a power like China.
I have a sneaking suspicion that they are much further ahead than they are revealing in public which explains their confidence and refusal to back down. Time will tell.