City Brain 3.0, launched in April 2025, integrates the DeepSeek-R1 model into urban management, making Hangzhou one of the first cities to use self-evolving AI for governance. The system detects 92% of traffic incidents automatically, has increased average traffic speeds by 15%, and manages low-altitude drone flight paths in real time.
Beyond traffic, City Brain monitors underground utility networks for road collapse risk, regulates chemical trade flows for safety compliance, and coordinates emergency response across city departments. The platform processes data from hundreds of thousands of sensors, cameras, and IoT devices.
The system raises fundamental questions about governance and privacy. City Brain makes cities measurably more efficient, but it also creates a comprehensive digital model of urban life that could be used for surveillance. Twenty-plus Chinese cities have adopted the technology; whether democratic societies would accept it is an open question.