Shenzhen, China - The video screen shows a constant procession of Chinese citizens moving past a camera at what appears to be a public festival, park or central city plaza. Their faces are bracketed by yellow squares with various numbers hovering below, including each person's estimated age and gender. If the person is known to the system, their name appears too. The facial recognition technology was just one of dozens of such systems at the China Hi-Tech Fair in the southern city of Shenzhen this month. But while other companies tried to bring some levity to the dystopian feel by making cute dog heads appear on the faces of passers-by, others had no qualms about showcasing the Orwellian nature of their products.