nobody wants additional competition. Bombardier, Embraer and Irkut are all facing the same challenge. Frankly, ARJ-21 was an important lesson for COMAC to learn in what it takes to develop commercial aircraft, but it's just not an impressive aircraft. Stop blaming politicians if ARJ-21 doesn't do well outside of China.
I think you somehow automatically took granted of me for "blaming politicians if ARJ-21 doesn't do well outside of China".
Political resistance is a fact under the table, nobody can deny it. The fact that your notion of "Bombardier, Embraer and Irkut all facing the same challenge" and "nobody wants additional competition" actually serves to support my point. So why debunk my point while essentially agreeing with it?
Neither was I trying to claim ARJ-21 being an impressive aircraft after being delayed for so long, a fact that even a blind person can see.
I wonder why you replied in this way, although I sense why, for that I will just leave it.
My preferred way of expressing the idea of yours, if you allow me, would be "Although possible political resistance is one challenge that ARJ-21 must face in opening over-sea market, the lack of technical and economical advantages is another challenge, even a bigger one."