目前，市场上或多或少地流通着一些假币，严重损害了消费者的利益，其实真钞与假钞的区别还是蛮大的，辨别方法也有多种，其中最简单且可靠的一种便是使用验钞机。不过，目前大部分的验钞机是台式的，不仅携带不方便，操作也不很方便，如果能把验钞机做成戒指一样戴在大拇指上? At present, some counterfeit money is circulating more or less on the market, which seriously damages the interests of consumers. In fact, the difference between genuine and counterfeit money is still quite large, and there are many distinguishing methods, of which the simplest and most reliable one Is the use of Yanchao Ji. However, most of the current validator is a desktop, not only inconvenient to carry, the operation is not very convenient, if the detector can be worn on the same ring as the thumb?