INVESTIGATION: 2.9 million TSMC chips diverted to Huawei — and Washington still hasn't closed the door

The autopsy in Ottawa

It all starts in a Canadian laboratory, far from the clean rooms of Taiwan.

Fall 2024. Engineers at TechInsights, an Ottawa firm that specializes in the autopsy of semiconductors, slice open a Chinese artificial-intelligence accelerator. Layer by layer, with the patience of a coroner searching for the cause of death.

Except this time, the coroner doesn't find a cause of death.

He finds an illegitimate birth.

At the heart of Huawei's Ascend 910B processor, the engineers identify a component etched by the largest foundry on Earth. Reuters describes the chip as the most advanced ever produced by a Chinese company.

Taiwanese silicon, sitting at the center of China's electronic brain.

TechInsights has done this work for years: cracking open packages, polishing away layers, tracing a circuit's genealogy back to the factory that made it. It is an exact science, and it is merciless.

Huawei has sat on the American blacklist since 2020. It is formally forbidden to receive any advanced chip made with American technology. This is one of the most closely watched embargoes on the planet — the kind they teach in week one of every compliance department.

And yet there it is, the forbidden part, under the lens, perfectly identifiable.

TechInsights alerts the foundry before even publishing its report. The procedure is clean, almost courteous.

In Hsinchu, someone must have read that email twice, then closed the office door.

The most scrutinized gatekeeper in the world had just armed its own adversary.

The client with the clean face

How do you get an elephant into a guarded room?

You don't. You send someone else — a polite visitor who resembles the elephant in his orders, never in his name.

That visitor is called Sophgo.

A Chinese chip-design company linked to the crypto-mining giant Bitmain, Reuters reports. A client with a spotless file: regular orders, invoices in order, not a single alarm in the registers. The kind of customer no compliance algorithm flags, precisely because he checks every box.

Sophgo placed orders with the Taiwanese foundry, in its own name, for roughly half a billion dollars' worth of silicon wafers.

Then those wafers, once diced into processors, took a route the purchase orders never mentioned. The exact route remains under investigation; the point of departure and the point of arrival are no longer in dispute.

Destination: Huawei.

The research firm SemiAnalysis ran the calculation that makes your head spin. That order volume represents roughly 2.9 million silicon dies — the cores that become processors once assembled.

2.9 million.

Not a suitcase slipped across a border at night.

Not a repainted container in a complicit port.

An industrial flow — massive, regular, invoiced, delivered in broad daylight with the stamp of the most scrutinized foundry on the planet.

The leak never needed darkness.

It placed an order.

Two weeks to decide

Go back to the fall of 2024, to the precise moment the email from Ottawa lands in Hsinchu.

The foundry does not agonize for long.

It informs American authorities roughly two weeks before the affair becomes public, Reuters reports. It notifies Taipei, then opens what it describes as a thorough internal investigation.

On October 26, 2024, the news breaks. All shipments to Sophgo are suspended, after the finding that the chip discovered inside Huawei's processor matched exactly the ones this client had been ordering. In this industry, cutting off a half-billion-dollar customer is never a casual gesture.

Exactly.

The word is technical, but it says everything: same design, same order, same pipeline. In a business where every photomask is a state secret, that correspondence leaves no room for coincidence.

Sophgo, for its part, swears up and down. The company denies any business relationship with Huawei, direct or indirect. It says it handed the foundry a detailed investigation report to prove its innocence. The denial is firm, public, repeated — and it is now part of the case file, right next to the chip.

Nobody saw anything.

Nobody shipped anything, if you believe the press releases.

And yet, somewhere between the fabs of Taiwan and the assembly lines of Shenzhen, 2.9 million silicon dies found their way to the most sanctioned corporate group in China. Without a single hand raised to admit carrying them.

That is the founding paradox of this entire affair.

The crime is proven by the object; the culprit is proven by no one.

The silicon confesses everything

A chip cannot lie. That is its great weakness as evidence: it carries its genealogy etched into its flesh.

TechInsights' analyses, relayed by the trade press, describe a compute die manufactured in the seven-nanometer class. A level of precision that Chinese foundries were then struggling to produce at volume. Reuters, which has tracked every stage of the affair, notes that this chip was already feeding Huawei's ambitions in artificial-intelligence servers.

Translation for humans: Huawei didn't merely obtain forbidden chips.

Huawei built, around those forbidden chips, a complete supercomputing architecture to train its artificial-intelligence models.

And artificial intelligence, in Beijing, is not a consumer toy. American documents have repeated it for years: the line between civilian and military no longer exists in China's doctrine of fusion.

It is the declared backbone of Chinese military modernization: guidance, reconnaissance, targeting, electronic warfare, mass surveillance. The models that steer drones train on the same processors as the ones that recommend videos.

Everything an embargo tries to delay, a well-fed server hall can accelerate.

Every diverted die brings China's army closer to the forbidden goal.

So read the number again, slowly.

2.9 million.

This is not a leak you patch with a press statement.

This is a pipeline.

The January 15 rule

Washington did eventually answer, and honesty requires saying so, because the answer exists.

On January 15, 2025, in the final days of the outgoing administration, the Commerce Department's export-control bureau published two rules cut to fit this exact case. Their declared purpose, word for word: close the breach that Huawei and Sophgo had exploited together.

The first imposes a licensing obligation on every foundry in the world for any advanced chip destined for a customer whose full chain of custody cannot be guaranteed. It is called the foundry due-diligence rule: know your customer all the way down, or ask permission. In other words, suspicion becomes the default, and trust becomes an exception you have to earn.

The second adds sixteen entities to the blacklist. Sixteen names, all at once, in the great registry of American trade prohibitions: chip designers, brokers, suspected front companies.

Including Sophgo.

The official announcement describes companies acting at the behest of Beijing to serve China's military objectives. That vocabulary is not a columnist's; it belongs to the United States government, in a public document.

At the behest of Beijing.

The text appears in the Federal Register the very next day, effective immediately, with full compliance demanded by the end of January. The American regulatory machine, so slow by habit, wrapped this one up in ten weeks. From public discovery to federal rule, that is a speed record for this machinery.

On paper, the door is shut; on paper only.

A billion dollars hanging over Hsinchu

For the Taiwanese foundry, the bill arrives in the spring.

In April 2025, Reuters reveals that the Commerce Department is weighing a fine of one billion dollars or more against the giant of Hsinchu. No final decision has been announced at that point, the agency notes, but the number alone gives the measure of the alleged fault.

The legal mechanics are brutal. American law allows the government to claim up to twice the value of the offending transactions. Half a billion in orders, multiplied by two, produces precisely that vertigo.

So much for the arithmetic.

The annual budget of America's export police runs around three hundred million dollars, according to the transcript of the June 2025 hearing. The fine being weighed against one negligent gatekeeper would exceed three years of that budget on its own.

But pause a second on what this fine actually says, beyond the amount. A record penalty against a company nobody suspects of wanting to cheat — that deserves a closer look.

The foundry is not a smuggler.

It is the victim of a diversion scheme; it raised the alarm and cut off the guilty client. Yet in the eyes of American law it remains the gatekeeper who didn't check hard enough before opening the door. That law doesn't merely demand that you not cheat: it demands proof that you did everything to keep others from cheating through you.

That is the whole ambiguity of the hunt. To trace the leak, Washington has to strike its own industrial ally — the West's first line of technological defense against China.

Punish the distracted guard, for lack of any way to reach the thief who is still running.

The thief will never pay the fine.

He lives in Shenzhen, and he assembles.

The door reopened

This is where the story changes nature, and where the betrayal changes sides.

Because while investigators were tracing the Sophgo pipeline, Washington was dismantling part of its own barriers. Piece by piece, explaining it was all the better to negotiate.

In the spring of 2025, the new Trump administration announces it will rescind the so-called AI diffusion rule inherited from the previous team. Commerce Under Secretary Jeffrey Kessler orders staff to stop enforcing it, even before its formal repeal. The announcement lands in early May 2025, barely months after the January rule took effect. One text rises, the other falls, and both are aimed at the same adversary.

Let's be fair to the White House's argument. The rule was heavy, it irritated allies, and the administration wanted it as commercial leverage against Beijing. A necessary evil, perhaps: chip diplomacy has its logic, and it has sometimes produced tangible results.

But leverage is not a lock. Leverage gets negotiated, traded, taken off the table; a lock has exactly one job, staying shut.

And while the lock sat on the negotiating table, the contraband kept moving through the hole.

In June 2025, before a House committee, the same Kessler drops a sentence no lawmaker in the room has forgotten. On the diversion of American chips to China: it's happening, it's a fact, it's happening.

The official transcript of that same hearing spells out the balance of forces. About two hundred people, in total, for America's export police — against tens of thousands of license applications every month.

Two hundred people.

To hunt, across the entire planet, flows that are counted in millions of silicon dies. The arithmetic of the hunt lives inside that impossible ratio.

A year later, in June 2026, Republican senator Jim Banks and Democratic senator Andy Kim write to Kessler together. Controls that can be dodged with simple purchase orders placed at the world's most advanced foundry provide no meaningful protection, they warn, Reuters reports.

No meaningful protection.

Eighteen months after the January 15 rule, two senators from both parties are still describing the same gaping door.

The lock is brand new.

The door, though, was left ajar.

The August 6 letter

And so we arrive at the present tense of this investigation, in the humidity of an election-year summer.

On August 6, 2026, John Moolenaar — Republican representative from Michigan and chairman of the House Select Committee on China — signs a letter addressed to Jeffrey Kessler. Reuters reveals it on August 10, noting it had never been reported before. The timing is not innocent: the letter goes out at the heart of summer, while the administration finalizes its decisions on the rules inherited from January 2025.

What Moolenaar writes to his own party's administration amounts to a warning. If fabs like the Taiwanese foundry, the largest in the world, decide their products are beyond the rules' reach, the risk of another Sophgo-style export-control failure will rise dramatically.

Another Sophgo-style failure.

The affair has become a common noun, a category, a precedent conjugated in the future tense in the corridors of Congress. In analysts' notes and committee hearings alike, Sophgo is no longer a company: it is a scenario.

The letter, published by the committee, demands precise gestures. Publicly confirm that the foundry due-diligence rule remains in force. Publish clear guidance on the worldwide licensing obligation for manufacturers. Formally rescind the diffusion rule while restoring a standalone license requirement. And grant the committee, before the end of the month, a briefing on the bureau's plans — including any ongoing investigation into chip diversion.

Read that last demand carefully.

Any ongoing investigation into the diversion.

Twenty-two months after the autopsy in Ottawa, the chairman of the House China committee is reduced to asking his own administration whether the hunt still exists. Whether anyone is still holding the thread; whether the files opened in January 2025 are still breathing.

He is not asking for results.

He is asking for a sign of life.

The hunt and its mirror

Let's sum up the pipeline, from microscope to letter, because the chronology is itself the verdict.

A Canadian lab slices open a Chinese chip and finds Taiwanese silicon inside. The foundry alerts Washington and cuts off the front client. Washington builds a rule, draws up a list, brandishes a billion-dollar fine. Then it dismantles part of its own scaffolding for commercial reasons, while its investigators admit in a hearing that the diversion is continuing. Every step of that chronology is documented, dated, signed — and none of it has been denied on the merits.

And at the end of the line, in August 2026, the most China-focused Republican in Congress has to write a letter begging his own side not to weaken the only rule the whole affair produced. The loop has closed — on the messenger, rather than on the fraudster.

That is the silent betrayal of this file, and it is double.

Sophgo's betrayal first — the client with the clean face, who diverted to China's military machine what the foundry believed it was selling to a server designer.

The system's betrayal second — it identified the breach, named it in its regulations, priced it in its fines, then hesitated to close it.

Beijing doesn't need to steal when we hesitate to lock up. It only needs to open an account, set up a front company, and pay at the register.

It orders, it awaits delivery, and it assembles while Washington debates the price of the lock. And all the while, in Taipei, the foundry pays the lawyers, the audits, the reputation — the gatekeeper settles the bill for the burglary.

Somewhere between Hsinchu, Shenzhen and Capitol Hill, exhausted investigators count silicon dies the way others count shell casings after a shooting.

2.9 million, for the one pipeline we managed to see.

How many for the ones nobody has X-rayed yet?

Sources :

Sources Primaires :

House Select Committee on China — Chairman John Moolenaar's letter to Under Secretary Jeffrey Kessler on the foundry due-diligence rule, dated August 6, 2026

Bureau of Industry and Security — January 15, 2025 statement: strengthened restrictions on advanced semiconductors, foundry due diligence, and 16 entities added including Sophgo, described as acting at the behest of Beijing

Federal Register — January 16, 2025 rule (90 FR 5298): implementation of additional due-diligence measures for advanced computing integrated circuits

GovInfo — Official transcript of the June 12, 2025 House hearing: Jeffrey Kessler's statements on chip diversion and the roughly 200-agent export-enforcement workforce

Sources Secondaires :

Reuters — Revelation of the Moolenaar letter urging the administration to stop any advanced chips from reaching sanctioned Chinese firms, August 10, 2026

Reuters — TSMC suspends shipments to Sophgo after one of its chips is found in a Huawei processor, October 26, 2024

Reuters — TSMC informed Washington roughly two weeks before publication of the TechInsights finding, October 22, 2024

Reuters — TSMC facing a potential fine of $1 billion or more in the US diversion probe; SemiAnalysis estimate of nearly 3 million chips, April 8, 2025

Reuters — Senators Jim Banks and Andy Kim urge tighter rules for contract chipmakers, calling current controls no meaningful protection, June 9, 2026

South China Morning Post — Washington blacklists Sophgo after the chip discovery at Huawei; the company's denial, January 16, 2025