China has overtaken the United States in supercomputing power by developing a system that deliberately avoids the advanced American technologies Washington has restricted. The LineShine supercomputer, installed at the National Supercomputing Center in Shenzhen, now ranks first in the TOP500 global ranking, delivering 2,198 exaflops of computing power and surpassing the U.S. system El Capitan by more than 20 percent.

What makes this achievement remarkable is not just the raw speed, but how China achieved it. Rather than relying on graphics processing units (GPUs) from Nvidia or other U.S. chipmakers, LineShine uses exclusively Chinese-designed central processing units (CPUs) and runs entirely on Chinese software and infrastructure. The system consists of roughly 45,000 LX2 processors, each with 304 cores, connected through a custom high-speed network called LingQi and running on Kylin OS, a Linux-based operating system widely used in China's scientific computing sector.

Why Is China Building Supercomputers Without U.S. Chips?

The answer lies in the escalating technology war between Washington and Beijing. Since 2019, the United States has imposed strict export controls on advanced semiconductors, software, and computing components in an effort to slow China's technological progress. During Trump's current administration, these restrictions have intensified through tariffs and limits on GPU imports and other artificial intelligence-related hardware. In response, China has adopted similar retaliatory measures, including banning 46 U.S. firms, mostly defense contractors, from doing business in the country.

Rather than crippling China's computing ambitions, these restrictions appear to have forced the country to invest heavily in developing homegrown alternatives. LineShine represents the culmination of years of research into architectures that can compete without access to the most advanced Western technologies. The message from Beijing is clear: China's tech industry can thrive despite lacking access to key U.S. technologies.

What Is Huawei's Alternative Approach to Chip Design?

Beyond supercomputers, other Chinese tech giants are pursuing their own paths around U.S. export controls. Huawei, which was placed on the U.S. Entity List in 2019 and cut off from advanced semiconductor technologies, has unveiled a new framework called the Tau Scaling Law that could reshape how chips are designed. The approach, presented by He Tingbo, president of Huawei's semiconductor business, focuses on reducing delays in data transmission across devices and systems rather than relying solely on shrinking transistor sizes.

"The industry must look not only at space but also at time, examining every level from transistors and circuits to chips and data centers to reduce transmission delays, synchronization time and computing latency," explained He Tingbo, President of Huawei's Semiconductor Business Department.

He Tingbo, President of Huawei's Semiconductor Business Department

He compared the concept to transforming a flat city into a three-dimensional city connected by millions of elevators, where information pathways are restructured so an entire system can complete tasks faster. Huawei claims the Tau Scaling Law could eventually achieve transistor densities equivalent to a 1.4-nanometer process by 2031, challenging the industry's long-held assumption that advanced extreme ultraviolet (EUV) lithography machines from Dutch company ASML are essential for producing cutting-edge chips.

Huawei has already developed 381 chips for telecommunications, smartphones, general computing, and artificial intelligence applications using principles behind the Tau Scaling Law over the past six years. The company's confidence in this approach was bolstered by its 2023 launch of the Mate 60 Pro smartphone, powered by the 5G-capable Kirin 9000S processor manufactured using a 7-nanometer process with existing equipment pushed to its limits.

How Are Export Controls Reshaping the Global Tech Landscape?

• Accelerating Domestic Innovation: Export restrictions are forcing China to invest billions in developing homegrown semiconductor capabilities, from supercomputers to smartphone processors, rather than relying on Western suppliers.
• Creating Technology Redundancy: Companies like Huawei are building "spare tire" strategies with backup chip designs and alternative architectures, reducing dependence on any single foreign supplier or technology standard.
• Fragmenting Global Standards: As China develops its own chip design frameworks and computing architectures, the world risks splitting into competing technology ecosystems that may not be compatible with each other.

The broader implications extend beyond supercomputers and smartphones. The White House has begun exerting unprecedented control over frontier artificial intelligence releases, forcing OpenAI to restrict its GPT-5.6 model to a small group of approved partners following direct intervention by the Office of the National Cyber Director. Meanwhile, the Commerce Department has partially approved Anthropic's request to resume selling its Mythos 5 model, but only to a restricted list of over 100 vetted cyber defenders and infrastructure providers.

These moves reflect a broader shift toward what some analysts call "sovereignty veto," where governments increasingly dictate which technologies companies can develop and to whom they can sell them. The strategy aims to maintain U.S. technological leadership, but it may be having the opposite effect: by cutting off access to advanced U.S. technologies, export controls are incentivizing competitors to build their own alternatives, potentially accelerating the very technological decentralization Washington seeks to prevent.

China's reclamation of the supercomputer crown suggests that export controls, while slowing progress in some areas, are not stopping innovation. Instead, they are redirecting it. As He Tingbo reflected on Huawei's journey through U.S. sanctions, she noted that the turning point came from viewing restrictions not as insurmountable obstacles but as engineering challenges to be solved. That mindset has transformed Chinese tech companies into fierce competitors developing their own solutions, potentially reshaping the global technology landscape for decades to come.