That is, in addition to the traditional way of swiping the card, you can also use the "flash payment" function, which corresponds to the electronic cash account. It can only be used on credit card devices with flash payment function. Now some large shopping malls have credit card equipment with "flash payment" sign. This is the same principle as the bus card, nothing special.

Up to now, it's basically useless, but this card was first issued and looks great.

It is said that the national standard for this thing has not been formulated, and the competition is fierce. Just study the trend of national technology stocks.