A man being erased by paralysis, fighting with the only part of himself still under his control.
In a room that is both office and prison, Cai Lei — a 48-year-old former executive at one of China's largest companies — has spent seven years refusing to let ALS define the boundaries of his contribution. Unable to move or speak, he communicates through the movement of his eyes alone, working twelve-hour days to accelerate research into the disease that is erasing him. His story is not simply one of survival, but of the ancient human insistence on purpose even when survival itself is no longer the point.
- ALS has stripped Cai Lei of nearly everything — movement, voice, independence — leaving only his eyes and his will as instruments of action.
- The disease's progression has been punctuated by acute crises, including a near-fatal airway blockage, requiring round-the-clock care from four dedicated caregivers just to keep him alive.
- Rather than withdrawing, Cai channels his remaining capacity into funding and directing ALS research, betting that his platform and resources can accelerate a cure he himself will almost certainly never receive.
- Eye-tracking technology has become the fragile but functional bridge between his paralyzed body and the world, enabling him to think, communicate, and lead despite near-total physical collapse.
- His case forces an uncomfortable reckoning: most ALS patients lack access to the caregivers, technology, and resources that make his continued engagement possible, exposing deep inequities in who gets to fight back.
Cai Lei cannot move. He cannot speak. At 48, the former vice-president of JD.com has spent seven years in the grip of amyotrophic lateral sclerosis, a disease that dismantles the motor neurons governing voluntary movement with methodical, unsparing precision. He has arrived at the stage where most people would have stopped. Instead, he works twelve hours a day.
His only remaining instrument is his gaze. Eye-tracking technology translates the movement of his eyes into text on a screen, allowing him to communicate, direct, and labor through the hours. The work is not symbolic. Cai is actively engaged in efforts to accelerate research toward a cure for the disease that is killing him — a man being erased by paralysis, fighting with the one part of himself still under his control.
The deterioration has been relentless. Four caregivers are required for the most basic movements. Sitting for extended periods brings pain and numbness as his muscles waste away. The disease has also brought him to the edge of death more than once. His assistant described an episode in which phlegm blocked his airway for nearly a minute — a minute he survived, as he has survived others, through the constant vigilance of his care team.
What sustains him is not hope for his own recovery. ALS does not reverse. But Cai has spoken of a faith in purpose — a belief that the time remaining can be directed toward something beyond his own survival. If the research he helps advance might spare someone else the same fate, then the hours at his desk carry meaning that outlasts him.
His story sits at the intersection of two modern realities: the devastating precision of a disease that attacks the body with cruel efficiency, and the growing capacity of technology to extend human agency even in the face of near-total paralysis. Yet his circumstances are rare. Most people with ALS do not have four caregivers, access to eye-tracking systems, or the resources to remain professionally engaged. The question his life quietly poses is not whether he will survive — that answer is already written — but what any of us do with the time we have, and whether that time can mean something beyond mere endurance.
Cai Lei sits at a desk in what has become his office and his prison. At 48, the former vice-president of JD.com, one of China's largest e-commerce platforms, cannot move his body or form words. Seven years into a battle with amyotrophic lateral sclerosis—a disease that methodically destroys the motor neurons controlling voluntary movement—he has arrived at the place where most people would have stopped. Instead, he works twelve hours a day.
His only instrument is his eyes. Using eye-tracking technology that translates his gaze into text on a screen, Cai communicates and labors through the hours. It is not metaphorical work. He is actively engaged in accelerating research toward a cure for the disease that is killing him. The irony is not lost on anyone watching: a man being erased by paralysis, fighting with the only part of himself still under his control.
The deterioration has been relentless. Seven years ago, when the diagnosis came, Cai could still move, still speak. Now he cannot do either. His body has become a series of constraints. Four caregivers are required to lift him from a chair or lower him into bed. Sitting for extended periods brings waves of pain and numbness as his muscles atrophy. The disease does not kill quickly or cleanly. It kills by degrees, by the slow subtraction of capability.
There have been moments when it nearly killed him faster. His assistant recounted to mainland media that Cai has survived several episodes where death was immediate and tangible. Once, phlegm accumulated in his throat, blocking his airway. For roughly a minute, he could not breathe. He survived that minute. He has survived others like it. Each time, the machinery of his care—the caregivers, the monitoring, the interventions—has pulled him back.
What drives a man in this condition to work twelve-hour days? Cai has spoken of faith, of something that sustains him through what he calls the darkest nights. It is not faith in recovery. ALS is incurable. The disease will not reverse. But there is faith in purpose, in the idea that the time remaining, however little, can be directed toward something beyond his own survival. If he cannot save himself, perhaps the work he does now—the research he helps accelerate, the attention he brings to the disease—might save someone else.
The technology that allows him to work is itself a small miracle of adaptation. Eye-tracking systems have evolved to the point where they can translate intention into action with enough fidelity that a paralyzed man can still think, still direct, still contribute. It is not a cure. It is not even a treatment. It is a bridge—a way to keep someone engaged with the world and with purpose even as the world is being systematically taken away.
His case sits at the intersection of two modern realities: the devastating precision of a disease like ALS, which attacks the body with methodical cruelty, and the growing capacity of technology to extend human agency even in the face of near-total paralysis. Cai Lei is not an outlier in his determination. But he is rare in his circumstances—a man with resources, with a platform, with the technological means to remain productive even as his body fails. Most people with ALS do not have four caregivers. Most do not have access to eye-tracking systems. Most do not have the option to work.
What happens next is written in the disease's timeline, not his own. ALS progresses. It does not pause. But for now, Cai Lei continues to show up at his desk, to direct his gaze at the screen, to work toward a cure he will likely never see. The question his life poses is not whether he will survive. It is what we do with the time we have, and whether that time can mean something beyond mere survival.
Notable Quotes
Cai has spoken of faith sustaining him through what he calls the darkest nights, though not faith in recovery—faith in purpose and the idea that remaining time can be directed toward research that might help others.— Cai Lei, via his assistant
The Hearth Conversation Another angle on the story
Why does someone in his condition keep working? What's the actual motivation here?
It's not about saving himself—he knows ALS is incurable. It's about directing what agency he has left toward something that might outlast him. The work becomes the only thing he can still control.
But twelve hours a day seems almost punishing. Is he pushing himself too hard?
Maybe. But consider the alternative: sitting still, watching the disease progress, feeling time slip away without purpose. For someone like Cai, work might be what keeps him tethered to meaning.
The eye-tracking technology—is that new, or has he always had access to it?
The technology exists now in ways it didn't years ago. But most ALS patients don't have the resources or the setup he does. He's privileged in that way, even in his paralysis.
Those near-death episodes sound terrifying. How does someone come back from that psychologically?
You don't really come back. You integrate it. You survive a minute without breath, and then you keep going, knowing it could happen again. That's a different kind of living.
What does 'faith' mean in his context, given that he knows the outcome?
Not faith in recovery. Faith that the work matters, that accelerating research for others is worth the effort of staying alive and engaged. It's faith in purpose, not in cure.