China warns US against fresh chip export controls as Nvidia row deepens

China warned the United States on Friday against imposing fresh export controls on semiconductors, in the latest exchange of a long-running technology dispute that has now become entangled with the escalating controversy around the chipmaker Nvidia.

Foreign ministry spokeswoman Mao Ning, asked at a regular briefing in Beijing about calls from US lawmakers for stricter limits on exports of chipmaking equipment to China, said China "has consistently opposed the abuse of export control measures". Such measures, she said, disrupt the stability of global industrial and supply chains and "serve no party's interests".

Mao said the two countries should instead implement the consensus reached by their heads of state and keep economic and trade relations stable. Her remarks came a day after Beijing rejected espionage allegations connected to the Nvidia affair, and ahead of an expected meeting between US President Donald Trump and Chinese President Xi Jinping next week at an APEC gathering in Shenzhen.

What happened

The immediate trigger for Friday's warning was a push in Washington for tighter restrictions covering not just finished chips but the sophisticated equipment used to manufacture them. US lawmakers, including House Speaker Mike Johnson, have voiced support for stricter limits on chip exports to China, arguing in general terms that advanced computing power has military as well as commercial uses.

Beijing's response followed a now-familiar script, but the timing gave it added weight. On Thursday, China rejected espionage allegations connected to the turmoil at Nvidia as a pretext for a technological blockade aimed at stopping China's advances in artificial intelligence. The allegations involve a former executive of Megaspeed, a Singapore data-centre company, who is accused of rerouting restricted AI chips.

The case has become the human face of a larger argument: Washington sees the risk of controlled technology leaking through third countries and intermediaries, while Beijing sees security cases being used as instruments of economic containment, designed to slow a rival's development rather than to address specific, proven threats.

Why chips have become the fault line

Semiconductors sit at the centre of the modern economy. The most advanced processors power the data centres where artificial intelligence models are trained, and they are designed by a handful of companies, made with equipment from an even smaller group of suppliers, and traded through supply chains that cross many borders.

That concentration is what makes export controls such a powerful tool, and such a disruptive one. The United States first restricted sales of Nvidia's most advanced AI processors to China four years ago, and the controls have been a defining feature of the technology relationship between the two countries ever since. Each tightening has encouraged Chinese firms to stockpile, find alternative supply routes and build capability of their own, while reported attempts to circumvent the rules have strengthened the hand of those in Washington arguing the controls do not go far enough.

The Nvidia controversy has sharpened every side of that debate at once. The company's co-founder Jensen Huang resigned on Thursday and has been summoned to testify before the US Congress in December, an extraordinary turn for one of the most valuable technology companies in the world. Lawmakers who already favoured tighter limits now have a corporate crisis to point to, while Beijing can present the spectacle as evidence that the pressure on Chinese access to technology is political as much as it is technical.

Export controls do not fall on one country alone: they affect equipment makers, chip designers, data-centre operators and customers far beyond China and the United States, including in allied economies whose companies are deeply embedded in the same production networks. That is why Beijing's warnings about supply chains are aimed at an audience well beyond Washington.

What happens next

Attention now turns to diplomacy. Trump and Xi are expected to meet next week at an APEC gathering in Shenzhen, and Mao's call for both sides to implement the consensus reached by their heads of state appeared designed to frame that meeting as the place where the temperature should come down. Summits rarely settle detailed export-control lists, but they can set the political weather in which officials negotiate the details.

Two other dates will shape the argument. Huang's summons to testify before Congress in December will give US lawmakers a public platform to press their case for stricter limits, and Nvidia's leadership turmoil means the company at the centre of the dispute will be answering questions while it is also trying to steady itself. And in Washington, the calls from lawmakers for stricter limits on chipmaking equipment will test how far the administration is willing to go beyond the controls already in place.

For Beijing, Friday's message was that any new measures would be read as an abuse of the export-control system and a threat to supply chains that serve no party's interests. For Washington's hawks, the message from the Nvidia affair is that existing controls are being tested and need reinforcing. The summit next week will show which of those arguments carries more weight between the world's two largest economies.