Most brain-computer interface (脑机接口, BCI) headlines feature surgery and implants. One company in Boston and Hangzhou bet that the bigger market is outside the operating room.
Han Bicheng (韩璧丞) built BrainCo on a counterintuitive premise: the ordinary, the wearable, the non-invasive.
Key takeaways
- Han Bicheng (韩璧丞), a Harvard brain-science doctoral candidate, founded BrainCo (强脑科技) in 2015, focusing on non-invasive brain-computer interfaces.
- The company says it built one of the first brain-computer-interface intelligent prosthetic hands, letting amputees control a hand with intent.
- Its smart prosthetic hand was named among Time's 100 Best Inventions of 2019, and Han was selected for MIT Technology Review's "35 Innovators Under 35" in 2017.
- BrainCo's products span assistive prosthetics, ADHD and focus training headbands (Focus), and wellness — all built on EEG sensing plus machine-learning decoding.
- Headquartered in the Greater Boston area near MIT and Harvard, the team is described as the first team founded in China incubated from a Harvard founding lab.
From lab curiosity to company
Han's interest in the brain began with a simple observation: the nose encodes smells as electrical signals the brain reads directly. If sensation could be translated into signals, he reasoned, so could intention. He pursued a doctorate at Harvard's Center for Brain Science and, in 2015, paused the degree to start BrainCo — reportedly the first team founded in China spun out of a Harvard founding lab.
The choice of a non-invasive path was deliberate. Having witnessed invasive implant procedures, Han argued that the technology with the widest human impact would be one ordinary people could wear, not one requiring surgery. That meant solving a brutally hard engineering problem: brain signals are roughly a millionth of a battery's strength, and the brain holds some 86–100 billion neurons firing in constantly shifting patterns.
The prosthetic hand
BrainCo's best-known product is a smart prosthetic hand controlled by residual nerve signals. The company says it spent about eight years building a hand that can be driven by the user's intent, with multiple motors enabling a range of everyday grips. For amputees who had been confined to passive hooks or stiff devices, the device restored a degree of dexterity and, the company argues, dignity. Time listed the hand among its 100 Best Inventions of 2019, and earlier the product won a MassChallenge gold award in 2016.
The harder, quieter innovation is in the interface: solid-gel electrodes that avoid the messy conductive paste of old EEG rigs, and machine-learning decoders that turn faint signals into stable commands. That pairing — better sensing plus better decoding — is the actual moat.
BrainCo's location tells its own story. Based in the Greater Boston area within walking distance of MIT and Harvard, the company drew scientists and engineers from those institutions and describes itself as the first team founded in China incubated from a Harvard founding lab. That cross-Pacific setup — research roots in Boston, manufacturing and scale-up increasingly tied to China — is increasingly common among hardware-focused AI startups, and it shapes how BrainCo hires, funds, and ships. Reported user cases, such as a double-hand amputee who has used the device since 2019 to write and grip, illustrate why the team spent close to a decade on a single hand rather than rushing a demo to market.
Beyond prosthetics
BrainCo extended the same stack into consumer and education products. Its Focus headband aimed at attention and ADHD training, using EEG to give feedback on focus. The company also markets wellness devices. The through-line is consistent: capture weak brain signals non-invasively, decode them with AI, and feed them back to the user or to a device.
Why it matters
Non-invasive BCI sits at the intersection of neuroscience and consumer hardware — a field where China and the U.S. are racing on different rails. Where invasive players chase medical breakthroughs requiring surgery, BrainCo and peers chase scale: millions of potential users for attention, rehabilitation, and human-machine control. Han has been grouped by Chinese media among Hangzhou's prominent young tech founders ("杭州六小龙"), reflecting how BCI has moved from lab curiosity to an industrial bet.
Honest limitations
BrainCo is privately held, so performance and sales figures are company claims rather than audited disclosures; I have not independently verified clinical efficacy of its ADHD or focus products. Awards (Time 2019, MIT TR35 2017) are documented but reflect selection by those publications, not peer-reviewed validation. Reports that BrainCo has filed for a Hong Kong IPO are media accounts the company has not formally confirmed, so I treat them as unverified. Birth year and some biographical details come from a single Chinese encyclopedic entry and should be read as indicative.
What readers can do now
- If you follow BCI, separate the invasive (implant) track from the non-invasive (wearable) track — they solve different problems and face different regulation.
- Families exploring prosthetics or focus training should ask vendors for published, independent evidence, not just demos.
- Watch BrainCo's licensing and data-privacy stance: its own statements emphasize on-device processing of biometric signals, a claim worth verifying before sharing health data.