Intelligence Note Details Alleged Chinese Support for Iran’s Military Rebuilding

Even as China has officially denied engaging in direct arms transfers to Iran, questions persist over Beijing’s role in Tehran’s ongoing efforts to rebuild its air and missile defence capabilities following the recent United States–Israel conflict.

According to an intelligence assessment accessed , much of the reported Chinese cooperation has involved components, technical access, and negotiations rather than confirmed large-scale weapons deliveries. Sanctions constraints and geopolitical sensitivities are said to have limited overt transfers. Nonetheless, the note outlines several systems and materials that may have strengthened Iran’s post-war defensive posture.

CM-302 Supersonic Anti-Ship Cruise Missiles

Among the most significant systems referenced is the CM-302 supersonic anti-ship cruise missile, the export variant of China’s YJ-12. Designed as a high-speed “carrier killer,” the missile is capable of targeting large naval assets, including aircraft carriers and destroyers.

With a reported range of 290–460 km and a 500 kg warhead, the missile features sea-skimming flight profiles and advanced evasion capabilities. Negotiations for its acquisition reportedly advanced in 2025 following the 12-day conflict and were said to be nearing completion by February 2026. If confirmed, such a transfer would significantly enhance Iran’s ability to threaten US naval forces operating in the Persian Gulf and the Strait of Hormuz.

While reports indicate that senior Iranian officials visited China in mid-2025 to finalise the deal, Beijing has denied the claims.

HQ-9B Air Defence Systems

The intelligence note also references the deployment of the HQ-9, particularly the HQ-9B variant, as part of Iran’s strategic air defence rebuilding.

With an estimated range of 200–260 km and high-altitude interception capability, the HQ-9B is widely regarded as China’s equivalent to Russia’s S-300 and S-400 systems. Deliveries and integration reportedly began in the summer of 2025, with systems positioned around key sites, including nuclear facilities, urban centres and military bases.

However, recent US-Israeli operations in 2026 are said to have exposed performance limitations when confronted with advanced stealth and precision threats, underscoring the challenges facing Iran’s layered air defence network.

YLC-8B UHF Long-Range Surveillance Radars

Another system cited is the YLC-8B UHF long-range surveillance radar, designed for early warning and integration into advanced air defence networks.

Operating in the UHF band, these 3D radars are particularly effective at detecting low-observable aircraft such as the F-35 Lightning II and the B-2 Spirit at extended ranges. Reports suggest multiple units were delivered beginning in 2025 and integrated into Iran’s defence grid to counter stealth and electronic jamming threats.

Missile Propellant Materials and Components

The note further highlights substantial transfers of missile propellant ingredients, including sodium perchlorate, which can be converted into ammonium perchlorate—an oxidiser that constitutes roughly 70% of the solid fuel used in many Iranian ballistic missiles.

A shipment of approximately 1,000 tonnes of sodium perchlorate in February 2025 is said to have provided sufficient material to produce 200–300 ballistic missiles, including systems such as the Haj Qasem missile and the Kheibar Shekan missile. Additional shipments and dual-use components, reportedly routed through sanctioned Chinese firms, are believed to have continued into late 2025 and early 2026 to replenish depleted missile stockpiles.

Loitering Munitions and Drone Systems

The assessment also refers to deliveries of loitering munitions—often described as “kamikaze drones”—used for precision one-way strikes against high-value targets. Similar in operational concept to the Shahed 136, these systems can loiter over a target area before diving to detonate on impact.

Offensive drone shipments were reportedly made during 2025–2026 as part of post-conflict replenishment efforts. Discussions are also said to have included man-portable air defence systems (MANPADS), anti-ballistic capabilities and even anti-satellite technologies.

Some intelligence reporting further suggests the possibility of hybrid architectures incorporating Chinese intelligence, surveillance and reconnaissance (ISR) support. However, these aspects remain less substantiated than hardware transfers such as radars and surface-to-air missile systems.

While Beijing continues to deny direct involvement in arms transfers, the intelligence note paints a picture of calibrated and strategic cooperation, focused on bolstering Iran’s defensive resilience without overtly breaching international red lines. The broader geopolitical implications of such alleged support are likely to remain a focal point of scrutiny as regional tensions persist.