What you mean by minimally competitive industry China do need plenty of regional jet since large swath of the west with their sparsely population wont make it economical to built dense railway network unlike in the eastern sea board. So there is real need for regional jet to serve these area. China has recently announce to built vast number of regional air port. ARJ 21 has receive 600 order sofar so even discounting some of them they are close to break even number
But the real benefit of ARJ 21 program is to prepare for C919 program Since China does not have civilian air industry before ARJ21. Designing plane is one thing but plane need support like training, maintenance, logistic, parts and marketing all the ancillary industry connected with aerospace industry. All has to be built from the ground up.
Not to forget developing civilian aerospace supply chain since most of the components for ARJ 21 is still imported. China does have military transport supply chain that is now can be augmented with civilian transport plane.
Here what I said about ARJ 21 in CDF
ARJ is complete success now that the production line has been ramp up to 30 per year and the second line in Pudong is open The first production plane just recently tested
All those crap from Aboulafia saying that ARJ 21 is overweight is nothing but bullcrap. China has hundred of regional airport opening up in the west They need stronger engine for taking off from high altitude airport That is why the engine is slightly oversize and yes you pay penalty with range This is plane design primarily to serve the western region of China where population density is thin and distance is vast
Certainly it take a long time to develop ARJ 21 because China never has any commercial airplane industry before She start from scratch and She has no access to Western tech everything she has to develop herself. Talking about late who about Mistubishi regional jet It take much longer development time than ARJ 21