The previous seven gates were about “how the thing gets made.” This gate is the layer of rules over all of them: who can buy advanced chips, and who can run an advanced process, is largely decided by export controls.

This piece only compiles each party’s public measures and makes no political commentary. It is the deep-dive version of Gate 8 in The AI Hardware Supply Chain, End to End.

What the Chip War Is

The “chip war” is the media’s umbrella term for the string of US–China moves around advanced AI chips, manufacturing equipment, and compute. The starting point is usually dated to October 2022, when the US began restricting advanced chips and equipment from flowing to China. The rules have been adjusted every year since, and they also affect equipment makers (such as ASML), chip designers (such as NVIDIA), and foundries (such as TSMC).

The US Control Toolkit: In Plain Terms

Enforcement runs through the Bureau of Industry and Security (BIS) under the Commerce Department. The tools come in three kinds:

  • Lists: the most famous is the Entity List. Selling to a company on it requires a license first, which is usually hard to get.
  • Rules and licenses: the Export Administration Regulations (EAR) set which chips and equipment are restricted and whether a license is needed first.
  • Review posture: “presumption of denial” is a near-blanket no; “case-by-case review” allows a sale when conditions are met.

H200: A Conditional, Narrow Door Opened in 2026

The H200 is NVIDIA’s Hopper-generation chip. It sits one to two generations behind Blackwell and Vera Rubin, but is still high-end.

A new rule effective January 15, 2026 changed the review of H200-class chips (including AMD equivalents) exported from the US to China and Macau from “presumption of denial” to “case-by-case review.” The conditions include:

  • Total processing performance (TPP) below 21,000, and memory bandwidth below 6,500 GB per second
  • Enough US supply, without taking foundry capacity away from US customers
  • Cumulative total performance of the same chip shipped to China and Macau no more than 50% of what is shipped for use inside the US
  • Buyers pass identity and security vetting (KYC)
  • Chips are first tested by a third party in the US

Re-exports from a third country to China or Macau still face presumption of denial. Blackwell and other newer chips did not get this case-by-case relaxation.

The often-quoted “US takes a 25% cut” actually works like this: the chips first enter the US for testing, and on import they face a 25% tariff under the January 2026 Section 232 proclamation (the legal basis for the US to adjust imports on national-security grounds). NVIDIA says it cannot pass this tariff on to customers.

The door opened, but few goods moved. According to Reuters, the US has approved about ten Chinese companies, but Beijing requires each purchase to be approved by the National Development and Reform Commission (NDRC). According to Reuters citing the FT, as of August 2026 ByteDance and Tencent had each received only about 10,000 chips. NVIDIA says that in the quarter ending July 2026, these shipments were under 1% of its data center revenue.

The Equipment Gate: No EUV, DUV Still Under Debate

Beyond chips, manufacturing equipment is another battleground, closely tied to the ASML gate. Without equipment and servicing, expansion, yields, and upgrades at advanced processes all slow down.

The most advanced EUV lithography machines have never been sold into China. The fight is over older DUV immersion tools and servicing:

  • Bills in Congress: the MATCH Act (scaled back in April 2026) would fully restrict DUV immersion tool shipments to China and require licenses for servicing too. It has been folded into a Senate amendment to the defense authorization act and had not passed as of late September 2026.
  • Executive action: according to Reuters, in April 2026 the US Commerce Department ordered several equipment makers to halt some shipments to Hua Hong, China’s second-largest chipmaker.

On China’s Side: Homegrown Chips and Saving Compute

Huawei Ascend is the flagship of China’s homegrown AI chips. Huawei says the Atlas 950 SuperPoD is in large-scale commercial use. The roadmap puts the 960 series in 2027, the 970 in 2028, and the 980 in 2029. According to a March 2026 Reuters report, ByteDance and Alibaba plan to place orders after testing the 950PR.

On manufacturing, teardown firm TechInsights finds that SMIC’s most advanced known process, N+3, is an extension of its 7nm-class process, with clearly less scaling than TSMC’s and Samsung’s 5nm. Beijing is also approving H200 purchases one by one while pushing domestic chips: according to Bloomberg, a national AI compute grid drafted by the NDRC requires more than 80% domestic technology.

On software, some Chinese AI companies save compute with methods like quantization and distillation (a large model “teaches” a smaller one).

The “Silicon Shield” and Taiwan’s Position

The “silicon shield” is an analytical concept, not a legal guarantee. It refers to Taiwan’s key position in the semiconductor supply chain, which may raise the incentive for the various parties to maintain regional stability.

The US “AI Diffusion” framework of early 2025 (it governs cross-border access to compute and has nothing to do with image generation) once placed Taiwan in the less-restricted Tier 1. But the US announced in May 2025 that it would not enforce it, a replacement draft was withdrawn in March 2026, and in July BIS Under Secretary Kessler said there were no plans for a replacement rule. So in practice there are no tiers, and Taiwan falls under ordinary export controls.

Do the Controls Work? A More Neutral View

The more neutral research view: the controls raise the cost and time for China to obtain advanced compute, but a full block is hard. Gaps include older equipment, smuggling, and third-country transshipment.

The controls carry costs too. A March 2026 survey by the think tank CSIS found that most firms (56%) reported export-license reviews averaging over 180 days, and 33% over 300 days. China also pushes back: as of October 2026, export licensing on 7 medium and heavy rare earths, in place since April 2025, is still in force, while the expanded version announced in October 2025 is paused.

Penchan’s summary

The one thing to remember from 2026: looser rules don’t mean goods will flow. When following this back-and-forth, keep announcements, drafts, bills, and rules in force apart. They are four different things.

To see the most tightly controlled equipment, read What Is ASML. To see how all eight gates connect, go back to the supply-chain overview.