It isn't surprise at all. J-20's projected price is slightly higher than Su-27/J-11 at the time of program start. So J-35A has to be a lot cheapper to be worth the effort.Not sure If anyone has already posted this or not (can't find) But Wang Yongqing says J35A is very economical
"Fighter is extremely efficient, fast and very economical... the scale will be large in number in the future..
Large scale and more uses"
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