Iran has never bought the M2 Buk system
China and Iran have longer military ties than Russia and Iran (
https://nationalinterest.org/blog/buzz/china-and-iran-joining-forces-beat-us-stealth-fighters-62647,
https://www.upi.com/Defense-News/2010/04/23/China-opens-missile-plant-in-Iran/82791272037022/,
https://warisboring.com/47047-2/
A representative of the CETC in Europe effectively confirmed Ma’arif’s assertions. “Our relations with Iran in this domain are very intensive. We are often surprised with the high level of Iranian knowledge in this matter.”
Sino-Iranian cooperation on air defenses is nothing new. It began in the late 1980s, when the Iranians began purchasing products such as the HQ-2 missile — based on the Soviet S-75/SA-2 Guideline — and the HQ-7 based on the French Crotale.
Although often disappointed by poor manufacturing quality, and sometimes accusing their Chinese partners for outright espionage, the Iranians have continued this cooperation. Unsurprisingly, several of the “new” Iranian radars that have appeared in the late 2000s were quickly recognized as derivatives of Chinese-made systems.
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Missile LY-80 is newer than the Buk M2 or SM1, It is suitable for modern warfare
The 3rd Khordad control room interface is similar to HQ-16, it is not like the Buk M2, outdated with transistor technology
The Khordad system's long-range radar is a JY-11B or IBIS-150 version of China
Sayyad 2C
9M317: the distance between the wing fins is quite large, the finnage of 9M317 is also bigger and shorter than Sayyad-2C
SM-1: The SM-1's tail fins have a trapezoid is inverted deginer compared to the other three types of missiles and it is attached to the middle fins
LY-80