I dont know if you are genuinely asking or just mocking.
I am assuming the first so I will requote from the article again
YMTC'sown supply chain audit, for example, found that many vital processes were not immediately replaceable with domestic vendors: high-end lenses, precision bearings, quality vacuum chambers, and motors, radio frequency components and programmable chips all still come from foreign manufacturers in the U.S., Japan and Europe, people briefed on the matter told Nikkei.
All these items are made by foreign-owned IP (US, Japan, Europe) which are not "immediately replaceable with domestic vendors"
I am not an engineer, but no way I am going to believe that list of items will hold YMTC back.
The high end lenses should be Germany, and probably bought off the shelf.
Ball bearings should be Germany, maybe Swiss?
Vacuum chambers, China probably can produce those, motors too.
Radio frequency components ain't high tech that is out of reach of China.
A field-programmable gate array, the programmable chip, should be a company like Xilinx, but those things only at 14nm or more like 28nm. Banned those from China, that is banning the entire access to China for those American chips. Also, those probably bought off the shelf too.
The logic chip, is just harder to make than the memory chip, which is YMTC business.
We have to expect that YMTC will be a peer competitor or maybe even better than the established companies like Samsung, Hylix, Micron in the near future.
btw, nice seeing you back, lol ...