[Just saying I may be guilty of digressing here. I will stop after this one comment.]Also, with regards to possible J-10 exports, what about these old rumours?
These are not the most reliable of sources. But the Iranian Air Force is dated like heck.
Oil prices are probably currently too low for them to be able to make a good deal but it is not like the Iranians have a lot of options.
One thing about the Iranians is they are picky as hell and usually prefer western stuff, either military equipment or civilian products. My first-hand and second-hand experiences are they have a not-very-explict contempt/distaste for Chinese tech products, although those are often their only choice.
Look at their attempt to build wacky F-5 derivatives. Frankly if they want to domestically build JF-17s, that can very well be arranged. At least there was such a time window before the sactions kicked in again. But no. They'd rather mostly focus on their existing systems.
The article also quoted a Taiwanese semi-tabloid that is, on the upside, usually willing to publish military news but on the other hand notorious for sensational and inaccurate reporting. Not really credible. And according to Wikipedia (yes), spokesman of the PRC foreign ministry actually refuted that piece of news: