AI chip smugglers exploit trade control loophole to bring banned HBM from South Korea into China

HBM stands for high-bandwidth memory. It is a fast type of memory placed close to a processor, often in stacked packages. That design lets it move much more data than ordinary memory. AI processors need this speed because they constantly exchange large amounts of model data during training and operation.

The article shows why HBM has become strategically important. Samsung and SK hynix make expensive HBM chips that are banned for export to China under the restrictions described. Smugglers attach those chips to cheap processors, then move the packaged boards through Hong Kong into Shenzhen.

The memory shortage makes HBM unusually valuable. A single HBM3E unit reportedly costs about $4,000 in China. CXMT is developing its own HBM3E, but low yields limit supply. That combination of intense AI demand, restricted imports, and limited domestic production makes HBM central to China’s ability to build advanced AI processors.

The loophole centers on what export-control checks examine. According to the article, the rules focus on the performance of the server processor, not every component attached to it. A smuggler therefore uses a cheap processor that can be exported, even though the HBM mounted beside it would be banned on its own.

The resulting package looks like an ordinary processor export under that narrow test. After reaching Hong Kong, the boards are carried across the border into Shenzhen in commuters’ luggage. Technicians then remove the valuable HBM from the otherwise unwanted hardware.

This method turns a legal-looking shipment into a way to move controlled memory. It is not risk-free. The article says South Korean and U.S. authorities may tighten enforcement as the operation becomes more popular, while Taiwan and Malaysia are also increasing anti-smuggling activity.

The article reports that HBM3E prices in China have surged sharply. A Shenzhen-based chip broker says one unit changed hands for several hundred dollars a year ago. Today, the price is about $4,000. That reflects the extreme value created by restricted supply and strong AI demand.

Each AI chip generally requires six to eight high-end memory chips. Multiplying the reported price by that requirement produces a memory value of roughly $24,000 to $32,000 for every AI GPU. The broker says he earns that amount by matching suppliers with companies desperate for HBM.

Those figures explain why the trade can remain profitable despite failed extractions and legal risks. The high unit price supports specialized smuggling and recovery workshops. It also raises the cost of AI hardware in China, especially when domestic manufacturers cannot yet supply enough suitable memory.

Once the packaged processors arrive in Shenzhen, they are taken to workshops for dismantling. Technicians heat the circuit boards to soften the solder. They then carefully lift out the valuable HBM chips and discard the other components, including the cheap processors used to make the shipment appear permissible.

The process is delicate and frequently goes wrong. The article notes that the failure rate is high, so some memory chips or boards are damaged during removal. Even so, the recovered HBM can be worth far more than the rest of the package. That makes the risky repair work economically attractive.

The incentive has grown with prices. A single HBM3E unit reportedly sells for about $4,000 in China, compared with several hundred dollars a year earlier. Brokers connect these recovered supplies with AI companies that cannot obtain enough high-end memory through regular channels.

Chinese AI companies face a severe HBM bottleneck. The article says Huawei cannot purchase HBM from Samsung and SK hynix. Chinese memory makers also lack enough capacity to meet demand. That leaves AI labs and chip companies searching for restricted imported memory through brokers and smuggling networks.

Huawei’s Ascend 950DT illustrates the effect. It reportedly sells for about $37,000, similar to Nvidia’s B200, yet delivers only half the performance of the earlier H100. For its next-generation 960DT, Huawei reportedly told customers they must find the HBM required by the servers themselves.

That arrangement shifts the supply problem onto buyers. It increases competition for scarce chips and encourages more smuggling. Prices rise as demand grows. The article says Chinese labs are already paying heavily for HBM, while domestic production has not yet supplied enough memory for Huawei’s needs.

Chinese companies have two broad routes described in the article. They can obtain HBM made by Samsung or SK hynix through brokers and smuggling operations. They can also wait for Chinese manufacturers, especially CXMT, to expand domestic HBM production. Huawei has reportedly required customers to find needed memory themselves.

CXMT has begun risk production of HBM3E and is expected to mass-produce it by the end of this year. However, the article says its production yield remains low. A low yield means too many manufacturing attempts do not produce usable chips, making each successful chip expensive and limiting the available volume.

Domestic production therefore cannot yet cover all demand from Chinese AI companies. Until capacity and yields improve, imported HBM remains highly valuable. The shortage raises prices, supports brokers and smugglers, and constrains the rollout of processors such as Huawei’s Ascend products.

Export controls are restrictions governments place on selling or transferring specified goods, software, or technology to certain countries or buyers. They can target complete products or individual components. In this case, the article describes controls involving U.S. and South Korean technology exports to China.

The restrictions matter because advanced computing systems depend on several parts working together. The article says Samsung and SK hynix HBM is banned for export to China, while the loophole focuses on the performance of the attached server processor. Smugglers exploit that distinction by pairing controlled memory with cheap processors.

Such controls can reduce access, raise prices, and slow production when replacement supplies are limited. The article links the restrictions to China’s HBM bottleneck and Huawei’s supply problems. It also reports that authorities may tighten enforcement as smuggling grows, potentially closing the loophole.