China has achieved let your humanoid robots run, they fight and even that execute choreographies with astonishing precision. That was the easy part. The key for a humanoid to stop being a fairground attraction and become a useful product is not in its legs, balance or its “brain”, but in something much smaller and much more complicated than it seems: the hands.
The challenge of the hands. The human hand has 27 bones, 34 muscles and countless nerve endings. Replicating this in metal and circuits is the biggest bottleneck facing modern robotics. sums it up well Guardian Zhou Yong, founder of LinkerBot, one of the most advanced Chinese startups in this field: manufacturing a robotic hand is “a hundred times more difficult” than manufacturing an entire humanoid. “The dexterity required by a hand is ten times greater than that of any other part of the body, but its volume is only one-tenth the volume,” Zhou says. That is, not only is it the most technically complex element, it is also the smallest.
The Chinese advantage. Pan Yunzhe, founder of Wuji Technology, studied in the United States and considered setting up his robotic hands company there, but soon saw that it was unviable. He tells The Guardian that “It was practically impossible to manufacture hardware in the United States due to the enormous limitations of the supply chain.” And China has an unmatched supply chain: it is agile, it is sophisticated and, above all, it is cheaper. This gives them a key advantage in hardware and allows companies like Linkerbot to already manufacture 5,000 robotic hands per month, a figure impossible to match anywhere else in the world.
The problem is the software. Making the hand is only half the job, you also have to make it move like a human hand and there is still a long way to go here. Nathan Lepora, professor of robotics and AI at the University of Bristol, sums it up: “the challenge of making these hands is already being solved,” but controlling them “is a completely different game… no one knows how to do it yet.” The scarcity of data is one of the big problems and it is that, while LLMs have been trained with the enormous amounts of data on the Internet, there is hardly any data on how a human hand moves and, above all, what it feels like when touching something.
To try to overcome this obstacle, Wuji Technology is testing a glove packed with sensors that captures all the movements of the human hand in everyday tasks. Its founder admits that being able to capture “how a person moves and what they touch or feel” is an “extremely complex and unsolved” task.
The robotics market. The Chinese robotic hands sector had a turnover of $7.4 billion last year, almost four times more than in 2024. LinkerBot, one of the leading startups, aspires to a valuation of $6 billion. The case of this startup is just one example of the robotics boom in China, where more than a million companies are already registered, 40% more than last year. This translates into brutal dominance: China already manufactures 90% of the world’s humanoid robots and it is the country with the most industrial robotsby much difference with the rest.
Yes, but. Robotics is advancing by leaps and bounds, but there are voices calling for calm, and not just any voice, but that of the International Federation of Robotics. In your report published in September last year were clear: “True multipurpose humanoids are still far away.” We are going to continue seeing more and more amazing demonstrations, but from there until they are sold en masse and we can all have one at home that is truly capable, there is a way to go.
Image | Xataka with Magnific
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