Answer: China
Notes: Reports indicate that Iran is close to finalising a defence deal with China to procure CM-302 supersonic anti-ship missiles to strengthen its naval strike capability. The CM-302 is a supersonic anti-ship cruise missile developed by China and is the export variant of the YJ-12 missile deployed by the Chinese Navy. The missile is specifically designed to target and destroy large naval vessels and other high-value maritime assets. It is powered by a liquid direct-flow air-breathing jet engine with four air intakes, enabling sustained high-speed flight. The missile can travel at speeds of around Mach 2.5 to Mach 3, making it extremely difficult for enemy air defence systems to intercept.
