Allegedly (!!!) the 131st Air Brigade is converting from J-10C to J-20, but it is not the main development here.
The photo is not a real image but sketches by the poster, claiming that CB09220 has appeared.
I have serious doubt whether it is true but many credible sources are re-posting it and add more details on this development like the change of radome.
My doubt:
1. The previous confirmed CB serial number indicated 20 aircraft per batch, so the 220th J-20 should be CB11220 instead of CB09220. However it is possible that each batch extends to 40 from some point of last year.
2. OP is in Chengdu instead of where 131st AB is based.
View attachment 111589
Well ... change of radome could be - maybe a wild guess! - a hint for the J-20B and the fact that the 131st AB is under conversion is not really new or a surprise. However the new cn. would be one.
But what does this mean?
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