IMAGINE that you’re taking a tour of Beijing and you stop at Tian’anmen Square.You want to know more about the history of the Square.You want to know where you can get a cup of tea.And you need to find out where the subway is，when you’re ready to go somewhere else.
Forget your guidebook and the tourist information office.Your mobile phone can help.If you hold the phone’s camera up to Tian’anmen Square，you can see all of this information on the screen.You can click on links(链接)for more information or check a map on your screen.
