你在电影院有没有见过这样的机器——操作台上没有按钮,只有一个扫描屏。用手机在这个屏幕上扫一下,机器就会打出一张票来,不用排队。难道手机里有什么秘密?其实是顾客已经网上预购了电影票,付款后就得到了一个二维码信息。这个扫描屏就是专门用来识别“已付费”的二维码的。也许有人还在纳闷,二维码到底是啥东东?这只能说明你OUT了。 Have you ever seen such a machine in a movie theater - there is no button on the console, there is only one screen. With your phone on this screen, the machine will play a ticket without queuing up. Is there any secret cell phone? In fact, the customer has online pre-order a movie ticket, after payment you get a two-dimensional code information. This scan screen is designed to identify the “paid” two-dimensional code. Some people may still wonder, two-dimensional code in the end is what stuff? This only shows you OUT.