[Zhao Jizong, Academician of the Chinese Academy of Sciences: there are four problems and challenges in clinical application of brain-computer interface; it is very difficult to analyze the data collected by brain-computer interface] Science and Technology Innovation Board Daily reported on the 29th that at the Zhongguancun Forum today, Zhao Jizong, academician of the Chinese Academy of Sciences, said that there are the following problems and challenges in the clinical application of brain-computer interface: 1. The brain has 800 to 100 billion neurons. It is very difficult to analyze the data collected by the brain-computer interface: which signals are useful and which are not, and little is known about how the signals interact. two。 The implantable electrode has the risk of operation, the implanted electrode may have immune reaction or infection, and glial scar tissue is formed around the electrode to attenuate the nerve signal. 3. The EEG obtained by non-invasive method is of poor quality and is vulnerable to external interference. 4. Brain-computer interface security: if some harm or threat to society is detected, whether corresponding measures should be taken. 5. To solve the above problems, physicians, scientists, engineers, ethicists, government supervision agencies and patient rights groups need to work closely to promote the healthy and rapid development of brain-computer interface. (reporter Li Mingming)