The urban novels about extraterrestrial technology usually contained some strange technology that might come from an alien planet or some unknown force. These technologies often had a major impact on people's lives and society, sometimes even changing the entire history of mankind. Such novels often involved interpersonal relationships, emotions, and morality. The emergence of extraterrestrial technology may have an impact on people's traditional thinking and values, making people need to re-examine their lifestyle and social structure. Common urban novels about extraterrestrial technology included the " Three-Body Problem " series, the " Galaxy Empire " series, and the " Matrix " series. These novels were all very interesting and worth reading.