The US Chip Perimeter Is a Tollbooth

In January 2026, the US fined TSMC $1 billion for Huawei's shell-company procurement of nearly three million dies ^[1]. That same month, the administration approved Nvidia H200 sales to China for a 25% government fee ^[2]. Two moves, one month, opposite directions — enforcement and exception-pricing side by side. The H200 framework replaced a "presumption of denial" with a managed-access system: a 25% fee to the US government, a volume cap of 50% of US domestic sales, and third-party testing ^[2]. The administration's argument was that keeping US chips in China discourages Huawei from developing independent designs. The 100% tariff threat on imported semiconductors came with a built-in off-ramp: companies actively building US facilities were exempted ^[3]. TSMC and Samsung took the deal — domestic investment became the entry fee that buys you out of the security regime. The UAE had been under advanced-technology transfer restrictions because of its ties to China. Those restrictions were lifted to enable the Stargate AI data-center project, a deal Trump personally brokered with South Korea and the UAE, with G42, Nvidia, OpenAI, Oracle, Cisco, and SoftBank participating ^[4]. In the October 2025 Trump-Xi trade truce, the US suspended a rule that would have expanded the blacklist of Chinese technology firms — trading security-perimeter tightening for China's resumption of rare-earth exports and soybean purchases ^[5]. Below the policy layer, the physical perimeter leaks regardless. Huawei acquired nearly three million TSMC dies through a shell company called Sophgo to build its Ascend 910C AI chip ^[1]. Seven Chinese military-linked universities, including the blacklisted Beihang and Northwestern Polytechnical, are seeking to lease Nvidia H200 chips through remote compute arrangements — a cloud loophole the Bureau of Industry and Security has not yet closed ^[6]. Alibaba accessed Nvidia chips through a Malaysian procurement chain using a Singaporean shell company ^[7]. The architecture looks comprehensive on paper; the physical perimeter is porous in practice. None of this means the controls are hollow. In September 2025, the US revoked the Validated End-User waivers that allowed TSMC, Samsung, and SK Hynix to import US chipmaking equipment into China without individual licenses, restricting their facilities to legacy technology and explicitly refusing capacity expansion or technology upgrades ^[8]. TSMC's replacement annual license for its Nanjing fab, secured on January 1, 2026, allows maintenance to avoid operational interruption but bans capacity expansion or technology upgrades — keeping China fabs a generation behind Taiwan, the US, and Japan ^[9]. In June 2026, the US closed the regulatory loophole that allowed Chinese companies to acquire advanced AI chips through overseas subsidiaries in countries like Malaysia ^[10]. The TSMC fine was real. The tightening is real. Both motions — enforcement and exception-pricing — proceed in parallel. The controls that remain are producing the outcome they were meant to prevent. China's AI chip self-sufficiency rose from 10% in 2021 to 41% in 2026; Morgan Stanley projects 86% by 2030 ^[10]. Alibaba has delivered 560,000 Zhenwu M890 chips — triple the performance of the previous generation — to more than 400 customers across 20 industries, with scaled mass production achieved ^[11]. DeepSeek founder Liang Wenfeng confirmed the controls had real impact.

chip export controls were a challenge for the company. — Liang Wenfeng

But DeepSeek is now developing custom inference chips to bypass them ^[12]. Huawei controls roughly half of China's $50 billion domestic AI chip market, with Alibaba and Baidu competing ^[11]. The controls worked as pressure — and the pressure built a competitor. China is now building its own perimeter. The Ministry of Commerce is consulting Alibaba, ByteDance, and Zhipu on restricting the overseas transfer of training data and model weights, and exploring measures to prevent TSMC and Qualcomm from manufacturing advanced chips based on Chinese designs from Huawei ^[13]. The two sides are not symmetric. The US system leaks through priced exceptions and porous procurement; China's controls are still taking shape, and there is no evidence yet that they function as tollbooths rather than walls. But the logic each side appeals to is the same — security as a reason to control the flow of chips, and the commerce that runs through them.