A brain-signal recorder weighing 3 grams sits hidden in the hair and records without the cap, headband or helmet that traditional EEG devices use. Tianjin University announced the device on 30 September, and its lab says it is building safety management models around it for workers in China’s licensed high-risk trades.

What Tianjin released

The Shengong Xumi Brain Cube comes from Tianjin University’s Haihe Laboratory of Brain-Computer Interaction and Human-Machine Integration and its partner company, Shengong Diting (Tianjin) Technology. It weighs 3 grams and measures about 2 cubic centimetres, with the electrodes, circuitry, battery and wireless link in a single unit fixed to the scalp among the hair. It records brain activity at 1,000 samples a second and runs for 8 to 10 hours on its battery. Its developers call it the smallest and lightest non-invasive brain-computer interface system yet made.

The lab says the device’s core performance meets the relevant requirements of GB 9706.226-2021, China’s mandatory safety and performance standard for electroencephalographs, adapted from the international standard IEC 60601-2-26. Meeting a standard is a step separate from registration as a medical device with the National Medical Products Administration, and the lab has not said whether it has applied.

The listed uses run from medicine to the classroom: long-term monitoring of brain-signal markers of health and disease, brain-controlled games and devices, sleep staging and neurofeedback, online measurement of learning and cognition, and recording several people at once in classrooms and research.

The lab is led by Ming Dong, a vice president of Tianjin University, whose team says it has commercialised more than 20 Shengong-series brain-computer interaction medical devices that have benefited thousands of patients. In a May interview, Ming warned the industry against hype, exaggeration and turning brain-computer interfaces into toys.

The worker-safety programme

With guidance from special-operations and emergency-management departments, the lab is working with leading companies and universities on what it calls brain-computer interface and smart-wearable safety management models for special-operations personnel. In China, special operations are the licensed jobs where an accident can seriously harm the worker or others, such as electrical work, welding and work at height. The lab has named no employer, sector or start date.

National policy points the same way. The national brain-computer interface plan that China’s Ministry of Industry and Information Technology and six other agencies signed in July 2025 calls for the hazardous-materials, nuclear, mining, power and other key industries to pilot brain-computer interfaces first, and to build industrial safety management platforms that warn of oxygen deprivation, poisoning and fainting. Among the product types the plan lists are portable, wearable devices that detect drowsiness, inattention, slowed reactions and abnormal posture, and EEG-based emotion-detection systems.

Not disclosed

The price, sale date and number of recording channels are not disclosed. Whether the device has been filed for registration with the National Medical Products Administration is not disclosed. The employers, sectors and number of workers in the safety programme, and how workers’ brain data will be stored, used and consented to, are not public. The ownership and funding of Shengong Diting were not stated in the announcement.

What to watch

Whether Tianjin files the device for medical-device registration, which would set what it can be sold for in Chinese hospitals.

Whether the worker-safety model reaches a named employer or industry, and whether it monitors fatigue and attention alone or also emotional state.

Whether Chinese regulators set rules on how employers may use workers’ brain data.

Sources

Primary:

• Science and Technology Daily: Tianjin releases 3-gram Shengong Xumi Brain Cube, 30 September 2026 (Chinese)
• Ministry of Industry and Information Technology and six agencies: implementation opinions on promoting innovative development of the brain-computer interface industry, July 2025 (Chinese)
• State Administration for Market Regulation: GB 9706.226-2021, particular requirements for the basic safety and essential performance of electroencephalographs (Chinese)
• State Administration of Work Safety, now part of the Ministry of Emergency Management: Order No. 30 on safety training and assessment of special-operations personnel, with the special-operations catalogue (Chinese, PDF)

Coverage:

• China Youth Daily: world’s lightest and smallest non-invasive BCI system released, 30 September 2026 (Chinese)
• IT Home via Phoenix New Media: world’s smallest non-invasive BCI system released in Tianjin, 4 October 2026 (Chinese)
• Xinhua Finance: interview with Tianjin University vice president Ming Dong, 20 May 2026 (Chinese)

Cross-reference to prior InsideBCI coverage:

• 2 October 2026: California bans employers from using AI tools to collect workers’ neural data
• 17 September 2026: China issues a medical-device standard for AI processing of EEG data in brain-computer interfaces
• 3 September 2026: NMPA clears Tiankai Suishi’s non-invasive EEG cap for cognitive-impairment diagnosis