Just blindly copying design details can still work out poorly without the background as to why certain design decisions were made.
I strongly suspect the ChiComs had good enough engineers to do the reverse engineering from the F-117 Clinton gave them in *his* illegal war.
I know, I know, “illegal war” has a bad ring to it as a term the left bandied about attacking Bush for invading Iraq. That war was, however, completely within the norms of international law, since we, as combatants in the Gulf War and parties to the armistice which ended it had a perfect right to resume hostilities on the basis of the perpetual violations of the armistice by the Ba’athist regime in Iraq. The NATO action against Serbia was naked aggression in defiance of international law and the NATO charter. Carried out, what’s worse, not on behalf of the national interests of any NATO member state, but on behalf of Albanian jihadis, drug-runners and white-slavers.
Creation dittoes!!!