The reasons are as follows: \x0d\ 1, Apple, Android and other functional phones do not have built-in QR code scanners, which is the most fatal factor. Due to the promotion of WeChat and Weibo in China, the application program has a built-in scanner, which does not need to be downloaded separately, and the usage method has been rapidly popularized. It is estimated that most people in the United States do not know how to use QR codes today, and the education of consumers is far behind the adoption of businesses. \x0d\2。 There are many websites on the Internet that can make QR codes and download scanners, and there is no uniform standard. Some companies also use their own QR codes, which are incompatible with most scanners and set up many barriers in use. \x0d\3。 Marketers also make many mistakes in the location of QR code promotion. For example, in airplanes and subways, there is no Internet access at all (the American subway is much behind China). Or put it in a TV commercial. When you find your mobile phone and turn on the scanner, it is too early to advertise for 30 seconds. It is also common to place QR codes on billboards, but sometimes the position is too high, or the QR code is too big and too small to scan. \x0d\4。 Even if the scan is successful, the opened web page is often disappointing. Sometimes viewers are taken to a web page that is not optimized for mobile phones, and it is difficult to read the information on it. Some even ask you to fill in a lot of personal information first. Or open the webpage and directly enter the video, which is difficult to watch smoothly due to the network speed problem, or some mobile phones simply cannot recognize Flash.