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China tightens port checks on Nvidia AI chips to enforce U.S. export curbs

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China has ramped up inspections on imported U.S. semiconductors, including Nvidia’s artificial intelligence chips, as part of a broader effort to strengthen oversight and promote domestic chip production, the Financial Times reported Friday.

Customs officials have reportedly been dispatched to major ports to scrutinize semiconductor shipments more closely. The inspections initially focused on Nvidia’s H20 and RTX Pro 6000D models — chips specifically designed to comply with U.S. export restrictions — but have since expanded to all advanced semiconductor products that could breach those controls.

Neither Nvidia nor China’s customs agency has commented publicly on the report, and Reuters said it could not independently verify the claims.

The move reflects Beijing’s deepening response to Washington’s tightening export rules, which have cut Chinese access to high-end chips used in artificial intelligence and supercomputing. The FT previously reported that over $1 billion worth of Nvidia’s top AI processors had been smuggled into China in just three months this year.

In recent months, Chinese authorities have also accused Nvidia of antitrust violations and ordered local tech giants to suspend chip purchases. While Huawei and other domestic firms have advanced their semiconductor capabilities, engineers within China’s tech sector acknowledge Nvidia’s chips remain unmatched in performance.

The heightened inspections come amid a geopolitical tug-of-war over AI leadership, with U.S. President Donald Trump signaling in August that he might loosen some restrictions on Nvidia’s exports to China — a move that could reshape the delicate balance in the global chip race.

China tightens rare earths export rules, adds semiconductor and defense curbs

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China sharply expanded its rare earths export restrictions on Thursday, adding five new elements and imposing stricter controls on semiconductor and defense users, in a move seen as tightening Beijing’s grip on critical materials ahead of Trump–Xi talks later this month.

The Ministry of Commerce said the new rules include holmium, erbium, thulium, europium, and ytterbium, bringing the total number of restricted rare earths to 12. Dozens of refining technologies were also added to the control list, while foreign companies using Chinese materials or equipment will now need a Chinese export licence — even if the finished product is made abroad.

China produces over 90% of the world’s processed rare earths, which are vital for EVs, aircraft engines, radars, and advanced chips. The new curbs come amid escalating U.S.–China tech tensions, following American calls to expand chip export bans.

Beijing said the rules will take effect November 8, with extra measures for foreign users from December 1. It also stated that defense-related users will not be granted licences, and chipmakers working on 14-nanometer or smaller chips and AI with military potential will face case-by-case reviews.

“The move helps Beijing gain leverage ahead of the Trump–Xi summit,” said Tim Zhang of Edge Research. Analysts described the controls as part of a global supply chain split, with China localizing production while the U.S. and allies accelerate their own.

Shares in Chinese and U.S. rare earth firms surged on the news, as investors braced for a new phase of strategic competition over the world’s most critical materials.

AI Chipmaker Cerebras Withdraws U.S. IPO Filing After $1.1 Billion Fundraising Round

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Cerebras Systems, the California-based AI chip startup seen as one of the most promising challengers to Nvidia, has withdrawn its planned U.S. initial public offering (IPO), according to a regulatory filing on Friday. The decision takes effect immediately and comes just days after the company closed a massive $1.1 billion funding round.

The move surprised some investors given that U.S. IPO activity has recently rebounded sharply, buoyed by surging enthusiasm for AI-related stocks. Recent debuts, such as Fermi’s data center REIT listing, have drawn strong investor demand, reversing a slump caused by trade-policy and market uncertainty earlier in the year.

Analysts said the withdrawal likely reflects strategic timing rather than weak market sentiment. “Given that Cerebras just very recently completed a sizeable fund raise, it is of no surprise that they are holding off to pursue the IPO at this time,” said Josef Schuster, CEO of IPO research firm IPOX.

Cerebras’ latest financing round—led by Fidelity Management & Research and Atreides Management—valued the company at $8.1 billion and included participation from Tiger Global, Valor Equity Partners, and 1789 Capital, a fund partially linked to Donald Trump Jr.

Despite withdrawing the IPO filing, CEO Andrew Feldman emphasized that the company still intends to go public eventually. “We’re continuing to execute on our roadmap,” he said earlier in the week, noting that Cerebras’ focus remains on scaling production and commercialization of its high-performance AI chips designed to accelerate the training of large models.

The company had initially filed for a Nasdaq listing last year, but the process was delayed by a U.S. national security review of a $335 million investment from G42, an Abu Dhabi-based cloud and AI firm. That review reportedly examined potential concerns about foreign influence and technology transfer.

Industry observers view Cerebras’ decision as a pause, not a retreat. “This is more a company-specific strategic decision and does not tell us anything about the state of U.S. IPO sentiment, which we view as exceptionally strong,” Schuster added.

Founded in Sunnyvale, California, Cerebras Systems specializes in ultra-large AI processors and computing systems, including its flagship Wafer Scale Engine (WSE), a chip designed to massively outperform traditional GPUs in AI workloads. The company has become a key player in the rapidly expanding AI hardware ecosystem—one now defined by fierce competition, colossal valuations, and geopolitical scrutiny.