Chinese shoppers walk through a tunnel featuring QR codes all around at a shopping mall

Chinese shoppers walk through a tunnel featuring QR codes all around at a shopping mall in Nanjing city

WOW! A tunnel full of QR code appears at a shopping mall in Nanjing, capital of east China's Jiangsu Province. There are more than 400 codes represent brands advertisements, games and etc., which customers can get when they scan them using their smartphone.