I would not be overestimating this achievement, but not underestimating either. The truth is probably somewhere in the middle. China had access to the latest EU

I would not be overestimating this achievement, but not underestimating either. The truth is probably somewhere in the middle. China had access to the latest EUV tech for some time already, so they had abilities to reverse-engineer that tech. Eventually, the verdict will be clear only after we see actual chips produced using these machine, and when we learn their real yield.