The semiconductor process from 28 nm to 1 nm is the current world semiconductor process range, 28 nm is the entry level, but also the most widely used semiconductor process, the highest level are 14 nm, 7 nm, 5 nm, 2 nm and 1 nm.
China's 28 nm has reached the whole industrial chain, completely autonomous and controllable, 14 nm can be mass produced in SMIC, which is basically completely controllable, SMIC can also produce 5 nm chips through superposition technology.