Mo Zhang is revolutionizing the path from seeing a product to buying it. Say you're watching a program on a smart TV or another device, and you like an outfit being worn by a particular model on screen. Her software can identify the items and send you to a site where you can purchase the goods. Of course, there are more unsettling uses. The types of technology being developed by Yi have been the focus of much controversy in China in recent months thanks to their increased use in public security and policing.