The brothers behind Cambricon, the chip start-up powering China’s AI ambitions

Meng Jing

Back in March 2016, an artificial intelligence (AI) programme developed by Google made headlines when it bested world Go champ Lee Se-dol in what has been called humanity’s most complex game.

What few know is that to achieve the decisive victory, the AlphaGo programme had to be powered by nearly 2,000 central processing units (CPUs) and 300 graphics processing units (GPUs). The electricity bills were as high as US$3,000 a game at the time, Massachusetts Institute of Technology (MIT) professor Han Song said in a recent speech at Tsinghua University.

The same month as AlphaGo’s victory over South Korean master Lee, two Chinese brothers working in a research lab at the Chinese Academy of Sciences (CAS) started their own company in Beijing. Their mission: to develop computer chips tailored for AI applications, allowing smaller and more power-efficient machines, at a lower price.

Raised in East China’s Jiangxi province by an educator mother and electric engineer father, Chen Yunji, 36, and Chen Tianshi, 34, have similar backgrounds. Both entered college at an early age, when they were 14 and 16 years old respectively, and obtained their doctorate degrees in computer science by the time they were 24 before joining CAS’ computing technology institute as assistant researchers, according to a profile by, an electronic industry portal.

Cambricon declined an interview for this story.

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While most consumers may not have heard of their company, the 3-year-old Cambricon Technologies’ AI chips are everywhere now – according to CAS they have been used to power nearly 100 million smartphones and servers so far including those by Huawei Technologies and Alibaba Group, which is the parent company of the South China Morning Post.

Cambricon was valued at US$2.5 billion in June 2018, according to a company statement, making it one of China’s most valuable AI start-ups after it raised hundreds of millions of dollars in a Series B funding round.

Its long list of big-name investors include Alibaba Group and voice intelligence specialist iFlyTek, two of the four companies named by the Chinese government in 2017 as the country’s AI partners in an ambitious strategy to accelerate the country towards global technology leadership.

CAS, the cradle of China’s leading scientists, nominated Cambricon’s researchers for its Outstanding Science and Technology Achievement Awards 2019 last Friday for the company’s Cambricon A1 processor, which the academy said was the world’s first commercial deep learning processor.

Deep learning is a type of machine learning capable of adapting itself to new data and training its systems to learn on their own and recognise patterns. Its applications range from spotting diseases in medical images to teaching self-driving cars to stay on the road.

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The processor significantly outperforms traditional CPU and GPUs, according to a document posted on CAS’ official website.

Chen Yunji has compared traditional general-purpose processors to Swiss Army knives and deep-learning processors to kitchen knives.

“The Swiss Army knife has many applications, but when cooking a kitchen knife is still more handy,” he said in a 2017 interview with AI Xingqiu, an industry news portal. “Cambricon is like a good kitchen knife.”

The past few years have seen an increasing number of Chinese companies jump in the market to create the “kitchen knife” for AI, especially since Beijing announced its 2017 plan to make the country a world leader in the technology by 2030.

Recent tensions between the US and China, with the Trump administration cutting chips supplies to many Chinese tech companies, have also fuelled China’s determination to be independent in AI chip production.

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But when Chen Tianshi, Cambricon’s chief executive, started to focus his research on AI chips about 10 years ago as an assistant researcher at the computing technology institute of the CAS, it was a choice that was “out of the mainstream,” the low profile Chen told China Science Daily in January in one of the very few interviews he has given.

“AI itself was not a buzzword at the time, let alone producing chips that are dedicated for AI use,” he was quoted as saying in the story.

A lot has changed since then in China. No longer a niche area of research, AI chips have been developed by industry titans such as search giant Baidu, e-commerce behemoth Alibaba and Cambricon client Huawei, the world’s largest telecommunications equipment supplier.

On the increasingly competitive AI chip landscape, Chen Tianshi told tech blog Jazzyear in 2018 that professional chip companies such as Cambricon have an edge over tech conglomerates because they tend to provide a more comprehensive suite of products that can power a range of applications.

What Cambricon really wants to achieve is to become the “stepping stone” for ubiquitous AI applications in the future, he said in the January interview with China Science Daily.

“People don’t need to know our name, as long as we can support downstream [AI] applications, that is our contribution,” he said.

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