Chinese police officers in Zhenghou in the central region of Hennan have started testing facial-recognition glasses to catch suspects at train stations. The glasses are linked in real time to a database of alleged criminals and, according to LL Technology, the company that developed the device, it takes the system less than 100 milliseconds to identify faces. The glasses have lead to the arrest of dozens of criminals so far, says China's official newspaper, The People's Daily. The country is investing heavily in artificial intelligence and is reportedly building up a database that can recognize any of its 1.3 billion citizens in less than three seconds.