A cost-effectively interactive underground advertising system that uses NFC chips to engage customers, and give them even more. In order to raise the awareness in the public (consumers & advertisers) of this innovative subway ad system, it starts with mobile activated print posters and delivers exclusive free content in seconds. The content includes underground public services info (maps, estimated train arrival time) and entertainment pieces (songs, movies E-books) to make things easier for customers in the underground world. All they need to do is to turn on the NFC in their smartphones, and tap the touch point to get things they want.
At the same time, such valuable free content demonstrates the phone to smart poster sharing capabilities, and this new behavior and experience serves as advertising and tutorial for NFC Underground.