I sort of agree with what all you said. I'm not saying the Chinese government has an inferiority complex. I'm saying the public does. All governments, regardless if they're democracies or not, have to justify their hold on power or they face revolt. The Chinese people look at the West as having "gotten it right" because they're number one in the world. If one is perceived as having gotten it right, people are going to follow that path to success. The HJ-12 may perform less or better than the Javelin or whatever else. But they're still going to make it look like it because it's gotten all the positive advertisement. Why does Beijing beg to be a part of the International Space Station when it's clear it will never happen? China is going to build it own space station but that's secondary because they want to be a part of something established as a great achievement by the world so they can cash that in on their own citizens because that's how they see success. I bring up the Asian inferiority complex because that's where it comes from. Whether or not people in the government are inflicted, they're still have to appeal to that part in the public in order to legitimize their hold on power.
The public may or may not have an inferiority complex, but they're not the ones making the decisions for military procurement.
So my point is the same: whether the PLA choose a proven airframe or to develop a new airframe is not driven by vanity, but rather by technology, cost, and military demand.
You're making it sound like Beijing wants the PLA only to look like western militaries only to legitimize the civilian government, which is clearly both an impossible task and a futile one. Fortunately it is also not their aim, given what we can observe. The reason they want stealth fighters, aircraft carriers, large destroyers, ballistic missiles, submarines -- it isn't to show off.
They are seeking to modernize the military, to fulfill requirements of national defense. And modern militaries tend to have certain types of equipment that work in the same way and may also happen to look similar in configuration (eg.: HJ-12 and Javelin).
Honestly I'm surprised that I'm having to explain this this way, you've been here as long as I have and I've always thought you've understood these principles.
I think you are being far too sensitive to what you perceive as Beijing's desire (or the chinese people's desire) to be seen as modern or accepted. It may be there to an extent, but it doesn't quite reach to the degree of military procurement where they would rather buy things to be seen as modern rather than buy things for the capability their offer.
Also, since when was Beijing "begging" to be part of ISS? The US blocked them, and China shrugged and went on their way to develop their own. The way you talk also makes it sound like space stations are not a useful impetus for technology development and scientific research, and that China only wants it just to show off.
Don't get me wrong, clearly every nation exploits their military and scientific developments for nationalism, it isn't unique to China. I fully agree with that.
But you are waaaaay off mark if you use that reason and "inferiority complexes" to try to explain why the PLA chooses copies of airframes versus original airframe designs in some cases.