- Chinese firms are openly shipping hundreds of containers of drone-grade engines, microchips, fiber-optic cables, batteries, and gyroscopes to Iran and Russia.
- Exporters have stopped mislabeling cargo to dodge U.S. controls. Beijing calls the sanctions illegal “long-arm jurisdiction”.
- Washington has run three sanctions rounds in 18 months: two Chinese engine makers in Oct 2024, six PRC and Hong Kong front companies in Feb 2025. Volume went up.
China’s drone-component trade with Iran and Russia is now happening in plain view.
Washington says the exporters are getting bolder. Beijing says Washington is enforcing imaginary law on legal commerce.
Both claims are accurate. Neither describes what the sanctions are actually doing now.
From Covert to Open
The WSJ’s customs-data investigation names Xiamen Victory Technology as one firm now openly marketing the Limbach L550 engine.
That powerplant is the one most associated with Iran’s Shahed-136 attack drone — the long-range loitering munition Russia has used to hit Ukrainian electrical and port infrastructure since 2022.
UK-based Conflict Armament Research told the Journal it is finding a steadily rising share of Chinese-manufactured parts in Shahed wreckage recovered after Russian strikes.
Treasury officials, current and former, told the paper the same thing: exporters who once mislabeled cargo to dodge U.S. controls largely no longer bother.
Beijing’s reading is the opposite.
After Treasury’s October 2024 sanctions on Xiamen Limbach Aircraft Engine Company and Redlepus Vector Industry Shenzhen, Commerce Ministry spokesperson He Yadong responded that China “firmly opposes unilateral sanctions and long-arm jurisdiction without the basis of international law and the authorization of the UN Security Council.”
China has held that line through every round since. The items at issue are dual-use civilian goods. U.S. extraterritorial sanctions are illegal. Chinese law alone governs Chinese exporters.
Neither side disputes the customs data. They disagree about whether moving those goods to Tehran and Moscow is a crime.
What the Sanctions Are Actually For Now
The procurement pattern has been mapped in public for over a year.
Treasury’s February 26, 2025 designation named six China- and Hong Kong-based front companies funneling engines, RF connectors, valve assemblies, and production-line equipment to two Iranian end users (PKGB and NSMI).
The State Department’s parallel statement noted the same day that Iran exports finished drones onward to Russia.
The November 2025 USCC report calls the system a hub-and-spoke network with Hong Kong at the center.
Three rounds of designations in eighteen months. The volume went up.
What has quietly changed is the goal.
Per current and former U.S. officials cited by the Journal, Washington is no longer operating as if sanctions can stop the trade.
It is operating as if sanctions can raise its cost — by forcing Chinese firms to choose between U.S. correspondent banking and Russian or Iranian drone revenue, and by making each ruble or rial harder to convert.
That is a defensible strategy. It is not the strategy the program was originally sold to the public as.
Interdiction was the headline. Attrition is the policy.
The shift implies three things at once:
- The upstream component layer is now treated as a Chinese sovereign domain Washington cannot police directly.
- Future sanctions rounds will be measured in basis points of friction, not in shipments stopped.
- The political market for “China sanctions” is decoupled from any test of whether the goods actually move.
None of those positions are popular. All of them are on the table.