I must admit, I'm surprised and confused since what happened during the last days, totally exceeds my expectations ... as such still connected with a HUGE IF I tried to put this together:
IF these cn-number indeed use the same pattern we know from CAC and as such represent the numbers of J-20s built, then based on what we have so far (XX0011, CB0018, CB0121 & CB0256) there is one LRIP/prototype batch (XX), two batches with AL-31FN powered ones (CB00xx & CB01xx) and one batch using WS-10C (CB002xx).
So again - IF correct - then:
XX0011 = LRIP batch = at least 11, if not 12
CB0018 = first production batch (AL-31FN) = at least 18, if not 20-24
CB0121 = second production batch (AL-31FN) = at least 21 if not 20-24
CB0256 = third production batch (WS-10C) = at least 56
= 106 minimum or up to 12 + 2x 24 + 56 = 116.
In any case, we need more such construction numbers.
Any corrections and comments welcome!
I agree -- and to be honest, reaching about 100 airframes by late 2021 and slightly over 100 airframes by early 2022 is pretty reasonable and in line with some of our guesses in the past.
We were all assuming that CAC had been getting underway with more consistent J-20 production, meaning we should have expected something like this to happen -- i.e.: a relatively sudden expansion of numbers by a couple of dozen.
It certainly correlates with the total number of airframes that have been produced in terms of recent prototypes, in terms of airframes that Dingxin and Cangzhou have received, and based on the air brigades that we know have been fitted out or are being fitted out.