China reopened civilian rare-earth trade. US weapons were left waiting.

The vulnerable part of a US weapons system may be too small to see and too upstream to replace quickly. In June 2025, the unresolved item was a rare-earth magnet.

The US-China trade truce reached in London did not settle export clearance for specialized rare-earth magnets needed by US military suppliers for fighter jets and missile systems, Reuters reported on 15 June 2025. Two people briefed on the talks said Beijing had not committed to granting that clearance. The article date records the report of the London outcome, not the beginning of every export restriction.

The dispute had moved beyond tariffs. Chinese negotiators appeared to link progress on military-use rare-earth magnets to longstanding US curbs on exports of advanced artificial-intelligence chips to China. Washington had imposed those chip controls because of their possible military applications. Beijing’s position, as reported by Reuters, left a defence-related materials question inside a broader technology bargain.

The trade truce did open one route. China promised to fast-track licences for rare-earth applications from non-military US manufacturers among tens of thousands said to be pending. Those licences would last six months, and Beijing offered a “green channel” for trusted US companies. A Chinese magnet producer later said it had obtained licences that included the United States, while China’s Commerce Ministry confirmed some “compliant applications”.

That concession did not cover the materials at issue here. Reuters reported that China had not budged on specialized rare earths including samarium, which are needed for military applications and sat outside the London fast track. Automakers and other manufacturers largely needed other magnets, including dysprosium and terbium. The distinction prevents a civilian licence announcement from being treated as permission for defence-related exports.

Rare-earth magnets are upstream components. They can enter motors, actuators, guidance equipment or other assemblies long before a finished aircraft or missile reaches a US prime contractor. Export control at that stage can create a vulnerability even when design, integration and final assembly take place in the United States. The retrieved reporting identifies fighter jets and missile systems as users, but does not name a programme, contractor, magnet order or shipment.

China’s position was powerful because of its industrial concentration. Reuters reported that China dominated global rare-earth production and held a virtual monopoly on refining and processing. That does not mean every rare-earth input came from China, or that every US defence item depended on one Chinese licence. It does show why a specialized export decision could matter beyond the value of an individual magnet.

The dispute also exposed the difference between a supply risk and an immediate production halt. The article does not say that a US factory stopped, that a fighter was grounded, that a missile was cancelled or that a contractor ran out of stock. It gives no inventory level, alternative-source timeline or duration for the unresolved clearance. Existing reserves, substitute suppliers and previously approved licences could all affect the practical result.

Nor does the source say that Beijing formally “withheld” every military-use export. It says China had not committed to grant clearance for certain specialized magnets and had not budged on samarium outside the fast-track. The language matters. A pending or denied licence can delay a component. It is not proof that all exports were stopped or that a named weapon failed.

The diplomatic positions were also unsettled. The White House, State Department and Commerce Department did not immediately respond to Reuters’ requests for comment. China’s Foreign and Commerce ministries did not respond either. President Donald Trump called the London arrangement a “great deal” and said, “we have everything we need”, while Treasury Secretary Scott Bessent said there would be no “quid pro quo” linking US AI-chip restrictions to rare-earth access. Those statements did not resolve the military-magnet issue reported by the sources.