What I am trying to say?
China cannot achieve a production rate of 75 J20 Fifth Gen Aircrafts In a Calendar year in my opinion in the next five years. Hope that clarifies it. Chinese aerospace might be mighty but still pale to the F16 program, when an article mentions a production rate of 1 /day, it refers to takt time and not necessarily a turnkey of cranking out 260 aircrafts in a year. Such tuning of Production line takes a significant number of years for endless vsa and lean transformations to achieve that state in a production line. The Fortworth line that you are tomtom-ing actually was producing the aircraft since 75 and only achieved three shift takt in June of 87. Can China achieve a 75 J20's in a year, sure it can. Can that happen in the next 5 years as our friend suggest- I dont think so.
If I am proven wrong I will apologize. And I assure I will still be here in that time frame. That's about it.