If the news below is true then it's not a bad option at all!
The SU-30 discussion really depends on semi or full local production or not.
I wonder wether Russia will offer it for fears of Iranian reverse engineering along with pressure from US/Eu/Arab countries.
If SU-30 is a no go then Iran could consider J-31 and J-20 from China as potential fighter jets. They may not be up to par with Russia or US jets, but it's an improvement over the 1970's relics they currently have.
China Allegedly Sends Cutting-Edge Jet to Eye US-S Korea Joint Air Drill
Some evidence suggests that a Chinese fifth-generation J-20 fighter fulfilled an undercover operation earlier this week as the US and South Korea carried out the Vigilant Ace 2017 military exercise, Chinese media reported.
The People’s Liberation Army Air Force (PLAAF) earlier said on its Weibo account that its reconnaissance aircraft, during a preplanned training exercise, took off from an air base in northern China and flew "to places they had never been before,"
Asia Times quotedChinese agency Sina.
With Seoul still keeping silent, speculations have emerged that the Korean intelligence agencies may have failed to track the Chinese planes allegedly gathering information on the air drills, involving the Pentagon’s top-notch F-22 ace warplanes. This raises the question of which plane managed to come and go totally undetected.
"If that’s the case, then the only Chinese plane that was so stealthy that [it] could come and go totally undetected must be the J-20," one commentator said, as delivered by
Asia Times.
"One or two J-20s may have flown with the group, which first headed to the East China Sea in a freedom-of-navigation patrol, but the fighter then turned northeast and pierced Seoul’s airspace, taking advantage of its cutting-edge stealth coating without triggering any alarm on Seoul’s radars."
Other sources suggest that there was a whole, though small, batch of J-20s, which just entered service this year, at the key air force base in Cangzhou, in the northern province of Hebei.
https://sputniknews.com/world/201712101059869506-china-stealth-jet-korea-us-drill/
