They can do 7nm. But they use multiple patterning(printing the same pattern multiple times to get to 7nm), which is expensive. So it's not comparable on cost to

They can do 7nm. But they use multiple patterning(printing the same pattern multiple times to get to 7nm), which is expensive. So it's not comparable on cost to western single-patterning 7nm, and of course not to the leading edge on cost/size/power.