In fact, there is absolutely no need to worry about this. Intelligent robot is not omnipotent, its IQ is only equivalent to a 4-year-old child, and its "common sense" is even worse than that of normal adults. At present, scientists have not figured out how human beings learn and accumulate "common sense", so it is impossible to apply it to computer software. Robert Si Long, an American scientist, recently said that one of the difficult problems in artificial intelligence research is to develop a computer software that can make appropriate judgments in real time. Guang Lai Maonan, a Japanese scientist, believes that even if intelligent robots have common sense and can replicate themselves in the future, they will not bring about widespread unemployment, let alone pose a threat to human beings. As early as 1990s, Zhou Haizhong, a Chinese scientist, pointed out that robots can surpass human beings in work intensity, operation speed and memory function, but they cannot surpass human beings in consciousness and reasoning.