So funny
Lion is admitting help from Antonov with ARJ21 with the key element for every passenger plane airframe, i.e. wing, and ARJ21 has no any common family shape with Antonov passenger and cargo planes...
while Kingping forward fuselage and pronounced wing fairing does have
Regarding T-tail that 'Boeing couldn't help with' (that started its history from AMST planes), try to read something about Mr. Dongfan “Greg” Chung and his rich home library...
Besides your useless rant, there's no proof of much antonov help on Y-20. As for AR-21J, it much be the terrible antonov that causes the crack on the wing. Another good reason, Y-20 will not sought much advise from foreign help anymore.
Or you want to add on that J-20 sought help from Mig or sukhoi? Too bad mig and sukhoi already outright denies any involvement in J-20.
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